
Let's get your machine working.
Dyson Pure Hot+Cool™ HP04 (White/Silver)-
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Changing the carbon filters
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More help required
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There is a problem with my machine
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Dyson Link app and connectivity
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Post connection troubleshooting
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Losing connection frequently
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Issue not resolved, please speak to our Customer Support Team
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Connection journey
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Sign into your Dyson account
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Add a machine
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Can't see your machine
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Trouble with detecting your purifier
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We've found these Dyson machines
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Detecting your device
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Activate the pairing process
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Pairing machine
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Machine paired
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Password
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Confirming connection
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Machine not connected
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Connection issue
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Machine pairing issue
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Connection journey
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Add a machine
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Can't see your machine
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Trouble with detecting your purifier
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Machine not visible using Bluetooth
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Locate code
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Checking WiFi
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We've found these Dyson machines
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Machine connected
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Just using
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Select room
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Select in house location
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Purchase date
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Enable auto-updates
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Set worldwide location
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Setup complete
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Issue resolved
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New owner
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Machine not paired
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Pairing resolved
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Machine not visible using Bluetooth
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Locate your purifier's code
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Checking WiFi
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We've found these Dyson machines
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Detecting your device
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Pairing machine
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Machine paired
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Password
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Confirming connection
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Machine not connected
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Connection issue
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Machine connected
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Just using
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Select room
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Select in house location
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Purchase date
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Auto update
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Set worldwide location
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Setup complete
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Issue not resolved, please speak to our Customer Support Team
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Resolved
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New owner
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Machine not paired
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Pairing resolved
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We've found these Dyson machines
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Sign into your Dyson account
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Issue not resolved, please speak to our Customer Support Team
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Connection failed
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Issue not resolved, please speak to our Customer Support Team
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Using your purifier and the Dyson Link app
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Machines air information
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More help required
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Issue resolved
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App controls
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Airflow direction
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On/Off
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Automatic mode
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Fan speed
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Night mode
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Oscillation
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Timer
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Changing and resetting the filter
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Changing the carbon filters
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Changing the glass HEPA filter
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Scheduling
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Issue resolved
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Scheduling not working
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Issue resolved
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Home location
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Software information
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UI display screens
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Activity
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Air quality
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Product guide
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App remote
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Performance
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The airspeed won't change
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Test the remote control
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Replacing the remote control battery
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App airflow control
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Issue not resolved, please speak to our Customer Support Team
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Replacement part required
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Unable to use the App
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The other buttons on the remote are working
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Check your app
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Machine is only hot on one side
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My machine is not heating
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Power or electrical issue
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Machine run time
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No power
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Airflow but no oscillation
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The remote control doesn't work
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Check the Dyson Link app
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No power to machine
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Issue not resolved, please speak to our Customer Support Team
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Issue not resolved, please speak to our Customer Support Team
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Press the button
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Check the remote
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Check the Dyson Link app
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Check the app
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Unusual smell
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Issue not resolved, please speak to our Customer Support Team
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Dusty
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Replacement part required
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The filter needs replacing
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Changing the carbon filters
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Changing the glass HEPA filter
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Unusual noise
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Clicking noise
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Clicking when oscillating
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Issue not resolved, please speak to our Customer Support Team
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Low humming noise when turned off
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Whining or whistling noise
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Remove both filters
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Replacement part required
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Remove both filters
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Replacement part required
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Visible issue
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There is an issue with the display
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My readings are showing in different colours
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The display will not stay on my selected screen
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My display is reading green but the fan is working at high speed
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Reset the machine
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Night mode is not working
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My screen is not displaying correctly
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There is an issue with the display
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Move the machine
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VOC and/or NO2 readings do not show
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Less than one hour
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More than one hour
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There's a problem with the oscillation
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The oscillation won't turn off
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Check other remote functions
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Change the battery
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Check with the Dyson Link app
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Issue not resolved, please speak to our Customer Support Team
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The machine won't oscillate
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Issue not resolved, please speak to our Customer Support Team
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Remote control doesn't work
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Remote control doesn't work
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Change the battery
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Issue not resolved, please speak to our Customer Support Team
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Using your Dyson machine
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How to assemble your Dyson machine
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Changing the glass HEPA filter
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How to use the information menu
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Using the remote control
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User guide
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Where is the serial number located?
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Cleaning the machine
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Replacing the remote control battery
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Most common topics
Please select the appropriate option
When the appliance detects that the non-washable carbon filters need replacing the display on the appliance will show a full bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds. The shrouds will release with the glass HEPA filters attached.

To remove the carbon filters: press the tabs on both sides of the filters.

Dispose of the carbon filters in the bin. Dispose of used filter units in accordance with local regulations.
Push the new carbon filters onto the base until secure.

Push the shrouds until they click back into position in the base.

Plug the appliance in to the mains electricity supply and switch on.

Press and hold the Oscillation button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The carbon filter level will be reset and the appliance is ready to use.
Please select the appropriate option
Please select the appropriate option
Dyson Link app and connectivity
If this is your first time connecting, please select 'Connection journey'.
If you are experiencing an issue connecting, please select 'Connection failure'.
If you have already connected but are experiencing issues with your app, please select 'Post connection troubleshooting'.
Please select the appropriate option
App version
Please ensure you have the latest version of the Dyson Link App installed on your device.
Please select the appropriate option
Closer connection
Try moving the device closer to the purifier.
You can also move the purifier closer to your Wi-Fi router to ensure a stronger, more stable signal.
Please follow the next step.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Dyson Link app
You can download the latest version from the Google Play store or Apple iTunes.
Your My Dyson account
Once you have downloaded and updated the Dyson Link App, please login or register a My Dyson account.
To set up an account you will require a valid email address and password.
Please select the next step
Add a machine
Please select 'Add machine' at the bottom of the screen to begin the connection journey.
Please select the next step
Select your Dyson machine
Select your machine by choosing 'air treatment' and then your model of purifier.
Please select the next step
Trouble with detecting your purifier
Please check your purifier is plugged in and switched on.
Check your device's settings
Check that the Bluetooth and Wi-Fi are still enabled on your device.
Connectivity disabled on purifier
Press and hold your purifier's power button for 5 seconds. Once enabled, a solid white WiFi symbol will display on your purifier.
Please select the next step
We've found these Dyson machines
Please select your machine from the list of discovered machines.
Please select the next step
Detecting your device
Hold your device next to your machine's display
This will allow your machine to detect your device.
Make sure you hold your device to the left hand side of the display to ensure it detects your device
Please select the next step
Activating the pairing process
Press the power button on your machine.
This will activate the pairing process.
Ensure you press and release the button instantly
WARNING: Do not hold the button down
Please select the next step
Pairing machine
Please wait while the app verifies the connection with your machine.
Please select the next step
Machine paired
Now, let's complete your machine's connection set-up.
Please press 'Continue set-up' to proceed.
Please select the next step
Enter network password
Please enter the network password for your chosen network
Please select the next step
Confirming connection
This will just take a moment whilst we connect.
Please select the next step
Closer connection
Try moving the phone closer to the purifier.
Incorrect password
Please ensure you are typing in the correct and full WiFi password.
Encryption
Please ensure that your router is set to WPA / WPA2 security encryption
We advise you not to connect our product to a child protection Wi-Fi as this may restrict the connection.
If you have been successful in pairing your machine, please continue the connection journey by selecting "Machine connected".
If you are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
Factory reset
Press and hold the power button on the machine and the remote together for 10 seconds.
The LED screen will count down from 10.
Once this count down has been completed, the machine will have been reset.
By resetting the machine you will need to restart the connection journey, please select 'Connection journey troubleshooting' on the next step.
If you have already reset the machine and are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Dyson Link app
You can download the latest version from the Google Play store or Apple iTunes.
Your My Dyson account
Once you have downloaded and updated the Dyson Link App, please login or register a My Dyson account.
Please select the next step
Add a machine
Please select 'Add machine' at the bottom of the screen to begin the connection journey.
Please select the next step
Select your Dyson machine
Select your machine by choosing 'air treatment' and then your model of purifier.
Please select the next step
Trouble with detecting your purifier
Please check your purifier is plugged in and switched on.
Check your device's settings
Check that the Bluetooth and Wi-Fi are still enabled on your device.
Connectivity disabled on purifier
Press and hold your purifiers power button for 5 seconds. Once enabled a solid white WiFi symbol will display on your purifier.
Please select the next step
Manual connection
If you are not able to add your machine through the Bluetooth functionality, please procced to the next step and add your machine manually.
Please select the appropriate option
Locate your purifier's code
You will find an 8-digit code for your purifier by removed the shroud at the front of your machine.
It is located at the bottom of where the shroud sits on the main body of the machine.
Enter this code into the following screen and it should detect your machine.
Check the WiFi connection
Please check the devices connection to the home Wi-Fi.
This can be done by opening your devices search engine.
Factory reset
Press and hold the power button on the machine and the remote together for 10 seconds.
The LED screen will count down from 10.
Once this count down has been completed, the machine will have been reset.
By resetting the machine you will need to restart the connection journey, please select 'Connection journey troubleshooting' on the next step.
If you have already reset the machine and are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
We've found these Dyson machines
Please select your machine from the list of discovered machines.
Please select the next step
Machine connected
Your machine is now connected to your Dyson Link app.
Please follow the rest of the steps to complete the set-up process.
Are you this machine's new owner
Bypass ownership?
The owner of this machine will continue to have access to it, be able to control it, and view its data.
If you are happy with this, please press 'OK' below.
Please select the next step
Where is the machine?
Where is your purifier?
Personalise your machine and use it with voice control services.
Please select the next step
Select location
Please select a location from the list shown on your device before submitting and confirming your selection.
Alternatively, if you wanted to choose a custom location, scroll to the bottom and tap 'edit'.
Please select the next step
Select date
Please press 'select date' and tap the date you purchased your machine. We'll need this for your guarantee.
It is recommended that you keep hold of your proof of purchase.
Please select the next step
Auto update
Please ensure 'Auto-update' is turned on.
This will make sure you automatically receive the latest features and your app functions correctly.
Please select the next step
Set worldwide location
Tap the text at the top of the screen to set your location and display outdoor air quality information
Please select the next step
Setup complete
Your machine is now fully connected and setup.
If you need further assistance, please select that option.
Please select the appropriate option
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Taking ownership
If this product is not new, the previous owner will be notified and will no longer be able to use this machine with their Dyson Link app.
Please select the next step
Closer connection
Try moving the phone closer to the purifier.
Enable Bluetooth
Please ensure that your device has bluetooth switched on.
Please select the next step
Manual connection
If you are not able to add your machine through the Bluetooth functionality, please procced to the next step and add your machine manually.
Please select the appropriate option
Locating your purifier's code
You will find an 8-digit code for your purifier by removed the shroud at the front of your machine.
It is located at the bottom of where the shroud sits on the main body of the machine.
Enter this code into the following screen and it should detect your machine.
Check the WiFi connection
Please check the devices connection to the home Wi-Fi.
This can be done by opening your devices search engine.
Factory reset
Press and hold the power button on the machine and the remote together for 10 seconds.
The LED screen will count down from 10.
Once this count down has been completed, the machine will have been reset.
By resetting the machine you will need to restart the connection journey, please select 'Connection journey troubleshooting' on the next step.
If you have already reset the machine and are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
We've found these Dyson machines
Please select your machine from the list of discovered machines.
Please select the next step
Detecting your device
Hold your device next to your machine's display
This will allow your machine to detect your device.
Please select the next step
Pairing machine
Please wait while the app verifies the connection with your machine.
Please select the next step
Machine paired
Now, let's complete your machine's connection set-up.
Please press 'Continue set-up' to proceed.
Please select the next step
Enter network password
Please enter the network password for your chosen network.
Please select the next step
Confirming connection
This will just take a moment whilst we connect.
Please select the next step
Closer connection
Try moving the phone closer to the purifier.
Incorrect password
Please ensure you are typing in the correct and full WiFi password.
Encryption
Please ensure that your router is set to WPA / WPA2 security encryption
We advise you not to connect our product to a child protection Wi-Fi as this may restrict the connection.
If you have been successful in pairing your machine, please continue the connection journey by selecting "Machine connected".
If you are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
Check the WiFi connection
Please check the devices connection to the home Wi-Fi.
This can be done by opening your devices search engine.
Factory reset
Press and hold the power button on the machine and the remote together for 10 seconds.
The LED screen will count down from 10.
Once this count down has been completed, the machine will have been reset.
By resetting the machine you will need to restart the connection journey, please select 'Connection journey troubleshooting' on the next step.
If you have already reset the machine and are still experiencing an issue, please select 'Issue not resolved'
Please select the appropriate option
Machine connected
Your machine is now connected to your Dyson Link app.
Please follow the rest of the steps to complete the set-up process.
Are you this machine's new owner?
Bypass ownership?
The owner of this machine will continue to have access to it, be able to control it, and view its data.
If you are happy with this, please press 'OK' below.
Please select the next step
Where is the machine?
To personalise the machine and use with voice control services, select which room your machine is in.
Please select the next step
Select location
Please select a location from the list shown on your device before submitting and confirming your selection.
Alternatively, if you wanted to choose a custom location, scroll to the bottom and tap 'edit'.
Please select the next step
Select date
Please press 'select date' and tap the date you purchased your machine. We'll need this for your guarantee.
It is recommended that you keep hold of your proof of purchase.
Please select the next step
Auto update
Please ensure 'Auto-update' is turned on.
This will make sure you automatically receive the latest features and your app functions correctly.
Please select the next step
Set worldwide location
Tap the text at the top of the screen to set your location and display outdoor air quality information.
Please select the next step
Setup complete
Your machine is now fully connected and setup.
If you need further assistance, please select that option.
Please select the appropriate option
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Taking ownership
If this product is not new, the previous owner will be notified and will no longer be able to use this machine with their Dyson Link app.
Please select the next step
Closer connection
Try moving the phone closer to the purifier.
Bluetooth on
Please ensure that your device has bluetooth switched on.
Please select the next step
We've found these Dyson machines
Please select your machine from the list of discovered machines.
Please select the next step
Multiple failures logging into the account (4 or more will) will result in the account becoming locked. The account will remain locked for a 30 minutes period.
Password reset
If the password has recently been changed, a 30 minutes period will need to pass before you are able to log back into the Dyson Link app account.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Please select at which point the connection failed.
If the Dyson Link app has displayed an on-screen error which reads, 'We've detected a problem with your machine', please select that option.
If you are unsure where the connection journey failed, please restart the connection by selecting 'Connection journey' from the available options.
Please select the appropriate option
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Checking your machines air information
To check your machines air information, whilst on the chosen product, press the settings icon in the top right, then select your machines settings.
From here, navigate to the air option. Here you can check filters life and enable/disable continuous monitoring.
Please select the appropriate option
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
App controls
To control your machine whilst it is connected, press the remote control icon in the bottom left of the home screen.
Please select the appropriate option
Airflow direction
This button allows you to change the airflow direction between front or rear flow.

On/Off
The button highlighted will turn the main power to the machine on or off.

Automatic mode
You can set the machine to automatically purifier the room when it drops below a certain threshold by pressing the highlighted button to turn automatic mode on or off.

Fan speed
Change the airflow speed using the Airflow Speed Control.
NB: The fan speed setting is between 1-10.

Night mode
You can dim the machines LED display and turn on night mode by pressing the highlighted button.

Oscillation
The button highlighted will turn the machines oscillation on or off.

Timer
You can turn a timer on for your machine by pressing the highlighted button and selecting how long you want the machine to run for.
Selecting the correct filter
Your machine will come with both filters.
Please select the filter you need assistance with.
Please select the appropriate filter
Changing the carbon filters
When the appliance detects that the non-washable carbon filters need replacing the display on the appliance will show a solid green bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds. The shrouds will release with the glass HEPA filters attached.
To remove the carbon filters: press the tabs on both sides of the filters.
Dispose of the carbon filters in the bin. Dispose of used filter units in accordance with local regulations.
Push the new carbon filters onto the base until secure.
Push the shrouds until they click back into position in the base.
Plug the appliance in to the mains electricity supply and switch on.

Press and hold the Oscillation button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The carbon filter level will be reset and the appliance is ready to use.
Changing the glass HEPA filter
When the appliance detects that the nonwashable glass HEPA filters need replacing the display on the appliance will show a solid purple bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds.
The shrouds will release with the glass HEPA filters attached.
Empty the glass HEPA filters directly into the bin by pushing in both the purple tabs on the shrouds. Dispose of used filter units in accordance with local regulations.
Push the new glass HEPA filters into the shrouds until secure. Push the shrouds until they click back into position in the base.
Plug the appliance in to the mains electricity supply and switch on.
Press and hold the Night mode button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The glass HEPA filter level will be reset and the appliance is ready to use.
Scheduling
To setup a schedule on your machine, once your machine is connected, press the timer icon in the bottom right.
Select a time based on how long you want the machine to run before turning off.
Please select the appropriate option
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Scheduling issue
The scheduling function of the app will not work if there are more than 35 cleans scheduled per week. If you have more than 35 cleans scheduled, please remove as necessary.
If you have less than 35 cleans scheduled per week and you are still experiencing an issue, please remove all of the schedules and re-add each of them.
Has this resolved the problem?
We're glad the problem's been solved.
Please let us know if there's anything else we can help you with.
Setting your machines home location
To change your machines home location, whilst on the chosen product, press the settings icon in the top right, then select your machines settings.
From here, navigate to the home location option and change this to the new location.
Checking your machines software information
To check your machines software information, whilst on the chosen product, press the settings icon in the top right, then select your machines settings.
from here, navigate to the software option. Here you can check the software version and enable/disable auto-update.
Please select the appropriate option
Activity
Here you can view an overview of the average air quality in your home on a daily or weekly scale.
Air quality
On the app screen the customer will be able to see explanations for: Outdoor Air Quality; Particulate Matter (PM2.5); Outdoor Temperature; Relative Humidity (RH)
Product guide
Here you will find useful guides on how to get the most out of your machine:
- Know your purifier
- Quick start
- Lights
- Modes
The product guide also includes instructions on how to maintain your machine, and how to solve any problems, including those indicated by the fault lights on the machine.
Scroll up and down to view the options, swipe right and left to move between steps. This section also contains further information:
Contact Dyson
Privacy Policy
Licences
App remote
Here you can control your purifier without the need to use the remote;
On/Off/Auto
Airflow
Oscillation
Sleep timer
Night mode
Please select the appropriate option
On/Off
Ensure the machine is switched on.
Ensure correct button on remote is being pressed.
Point the remote directly at the front of the machine while pressing the button.

Remote control
Point the remote directly at the front of the machine while pressing the button.
Test cooling mode.

Test the heating control.

Test the oscillation.

Test the sleep timer.

Changing the battery
Unscrew the remote control's battery compartment.
Replacing the remote control battery
Loosen the base and pull it away from the remote. Replace the battery with type CR 2032.
App airflow control
Access the App to control the airflow.
Change settings within the app.
Has using the app resolved the problem?
Apologies. We can’t help you online.
But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Apologies. We can’t help you online.
But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Apologies. We can’t help you online.
But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Test airspeed change using the Dyson link app.
Heating elements
The heating elements turn on one at a time and so this is to be expected when the machine first turns on.
Run the purifier for 1 minute at the highest temperature setting.
NB: The heating elements will only work with the airflow facing forwards.
Target temperature
The heater will not operate unless the target temperature is above the room temperature. The temperature set on the machine is the target temperature of the room, not the temperature of the fan; the temperature from the fan when in heating mode will not change.
Press the red temperature control button until the digital display on the Main body shows 37°C.
Please select the appropriate option
Intermittent power
Dyson fan heaters and hot and cool purifiers have a positive safety feature where the machine deliberately switches off after 9 hours of continuous heating. This would also occur if the machine is set to auto and providing heat constantly for 9 hours. NB: This feature cannot be switched off.
Please select the appropriate option
Check using the remote control
Press the oscillation button on the remote.

If the using the buttons on the remote doesn't work, try changing the batteries.
Removing the battery
Unscrew the remote control's battery compartment.
Loosen the base and pull it away from the remote.
Replace the battery with type CR 2032.
Check with the Dyson Link app
Try using the Dyson Link app to control the oscillation.
Check the electrics
Check that the household electrics are on.
Check the plug and power cord for signs of damage.
Try the machine in a different plug socket.

Ensure the cable is firmly plugged into the back of the machine.
NB: There will be a 3 second delay when switching on after plugging in for the first time or when changing plug sockets.
Has this resolved the problem?
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Point the remote directly at the front of the machine while pressing the button.
Open the Dyson Link app.
Under your Purifier, open the remote on the app and press the ON/OFF button.
Open the Dyson Link app.
Under your Purifier, open the remote on the app and press the ON/OFF button.
Apologies. We can't help you online.
But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Check and clean machine
The following areas should be checked and cleaned to maintain the machine's performance.
Clean loop amplifier with a dry or damp cloth.
Clean the Main body with a dry cloth.

Clean inlet grille with a dry cloth or soft brush.
Your filter may need replacing.
Check filter life within the app, on the display screen, or for excessive build up of dust within the inlet.
Has this resolved the problem?
Apologies. We can’t help you online.
But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Please select the appropriate option
When the appliance detects that the non-washable carbon filters need replacing the display on the appliance will show a full bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds. The shrouds will release with the glass HEPA filters attached.

To remove the carbon filters: press the tabs on both sides of the filters.

Dispose of the carbon filters in the bin. Dispose of used filter units in accordance with local regulations.
Push the new carbon filters onto the base until secure.

Push the shrouds until they click back into position in the base.

Plug the appliance in to the mains electricity supply and switch on.

Press and hold the Oscillation button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The carbon filter level will be reset and the appliance is ready to use.

When the appliance detects that the nonwashable glass HEPA filters need replacing the display on the appliance will show a full bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds.

The shrouds will release with the glass HEPA filters attached.

Empty the glass HEPA filters directly into the bin by pushing in both the purple tabs on the shrouds. Dispose of used filter units in accordance with local regulations.

Push the new glass HEPA filters into the shrouds until secure. Push the shrouds until they click back into position in the base.

Press and hold the Night mode button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The glass HEPA filter level will be reset and the appliance is ready to use.

Please select the appropriate option
When your purifier switches from front to rear airflow there may be a clicking sound as the motor adjusts direction.
This is a normal sound for the purifier to make and is not an indicator of anything wrong with your machine.
Check base
Check around the base of the machine for any debris or obstructions.
Please try taking the filters off, then reattaching them to ensure they are correctly clicked into place. When attaching the filters, press in and up, and check there are no gaps or loose areas.
If the filters are not attached correctly, a triangle warning may show on your screen. If this happens, please reattach the filters securely.
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Continuous monitoring
The continuous monitoring option is used for air quality, temperature and humidity data to be relayed to the machine and app at all times, even when you have turned the purifier off. The sensors have small fans that maintain airflow for continuous monitoring, but this should not cause any audible noise interference.
There may be instances when the display shows green, indicating high air quality, but the fan speed is still high. This is due to the machine constantly seeking to maintain a good air quality, and in scenarios such as rooms with leaky windows, the machine must work harder to maintain a good air quality.
This will only happen when the machine is set on auto. To turn off Auto mode, please select Manual mode, either using the remote control or on the app.

Please check the following on the app:
Swipe up to reveal the setting tab and tap to open options.
Swipe down to find the continuous monitoring option and tap to open.
Turn OFF the 'Collect data when in standby' option. (The icon will turn grey when turned off). Save the change by pressing 'Done' at the top right of the page.
Continuous monitoring can now also be turned on/off by pressing the 'Auto' button on the remote control for five seconds.
Retest the machine.
Restart the machine
Unplug the machine and leave it for 10 seconds.

Ensure the power cord is plugged into the center of the base.
Plug the machine back in and retest.

Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds.

The shrouds will release with the glass HEPA filters attached.

Plug the machine back in and retest.

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Call us on 1-877-397-6622
When not in use, unplug from the mains electricity supply.

To remove the carbon filters: press the tabs on both sides of the filters.

Plug the machine back in and retest.

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But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Please ensure you have the most up to date software downloaded before beginning any checks. We strongly recommended enabling auto-updates in your Dyson Link app settings, to allow the most up to date software to be installed as soon as it is available.
Please select the appropriate option
Please select the appropriate option
The colour of the numbers and readings on the display are linked to the air quality of the respective category.
Green denotes a high air quality, with low pollutants, and red, low air quality with a high amount of pollutants.
Different categories can have different levels of pollutants at the same time, and will therefore display in different colours.
The interface is designed to stay on the screen you select. Please ensure the remote is not being accidentally pressed.
There may be times when the display is showing green but the fan speed is still high.
This is due to the machine always trying to maintain high air quality. For example, in a room with leaky windows, the machine has to work harder via a higher Fan speed to maintain a high air quality.
If you want the fan to be quieter, you can choose to change the airflow direction to face backwards, or turn the machine to manual mode and lower the airspeed.
Fault
Reset the machine.

Unplug the machine and leave it for 10 seconds.

Plug the machine back in and retest.

Night mode is not working
When in Night mode, your machine will automatically sense the ambient light level and adjust the resting screen brightness accordingly.
If the room is bright, (for example, the lights are on), the screen's display will be set to minimum brightness. If the room is dark (lights off) the screen is turned off.
In both scenarios, when the machine is interacted with, the screen brightness will uplift.
If your screen is not displaying correctly (incorrect reading, white screen etc), please ensure you have updated all the software to the latest version.
When setting up a product, we strongly recommend enabling auto-updates, to allow your machine to easily download the latest software.
To enable auto-updates, open the Dyson Link app and click the cog at the top right of the home screen.
Click 'Your Purifier's settings'.
Scroll down to 'Software' and enable Auto-update.
Restart the machine
Switch off and unplug the machine.

Ensure all outside doors and windows are closed.
Vacuum the two sensor slots to the left of the LCD screen with a Dyson brush attachment.

Plug in and test the machine.

Switch off and unplug the machine.

Move the machine to another room.
Plug in and test the machine.

The first time your purifier is turned on, the gas sensors will perform a self-calibration which takes one hour after which time they will work normally.
If the power cuts out within the hour, the initialisation period will continue from where it left off.
How long has your purifier been turned on for?
If your machine is new out the box and has not been turned on for over an hour, please allow a full hour to complete, with your purifier plugged into a secure power source.
Once the full hour has elapsed, turn the machine off and then on again, either with the main power button on the machine, or the remote control.
If your purifier has been plugged into a stable power source for over one hour, and the VOC and/or NO2 screens still do not show, please unplug your machine from the wall, leave for one minute, plug back in, and then turn on using either the main power button, or the button on the remote.
Please select the appropriate option
Check remote control
Ensure the correct button on the remote is being pressed.

Remote control
Point the remote directly at the front of the machine while pressing the button.
Test cooling mode.

Test the heating control.
Test the airflow.

Test the sleep timer.

Changing the battery
Unscrew the remote control's battery compartment.
Loosen the base and pull it away from the remote. Replace the battery with type CR 2032.
Check with the Dyson Link app
Open the app and set the machine to oscillate.
If you do not have the Dyson Link app set up, please select 'No' as the next option.
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But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Check machine base
Ensure all the feet are attached to the base of the machine.
Place the purifier on a flat, non-slip surface.
Check remote control
Ensure the correct button on the remote is being pressed.

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But our Customer Support Team will be able to solve your problem. Call us on 1-877-397-6622
Point the remote at the base of the purifier and test the controls.
Changing the battery
Unscrew the remote control's battery compartment.
Loosen the base and pull it away from the remote. Replace the battery with type CR 2032.
Apologies. We can’t help you online.
But our Customer Support Team will be able to solve your problem.
Call us on 1-877-397-6622
Use both hands to lift the appliance out of the box, taking care to hold by the base of the appliance only. Do not lift out by the loop amplifier.
Slide the buttons down on either side of the shrouds. The shrouds will release with the glass HEPA filters attached.

Take the carbon filters out of the box and remove the protective packaging.
Attach both carbon filters to the appliance.

Position the shrouds onto the base and push gently until they click securely into place. Place the remote control on the top of the appliance with the buttons facing down. Plug in and switch ON.

When the appliance detects that the nonwashable glass HEPA filters need replacing, the display on the appliance will show a full bar.
Unplug the appliance from the mains electricity supply. Slide the buttons down on either side of the shrouds.

The shrouds will release with the glass HEPA filters attached.

Empty the glass HEPA filters directly into the bin by pushing in both the purple tabs on the shrouds. Dispose of used filter units in accordance with local regulations.

Push the new glass HEPA filters into the shrouds until secure. Push the shrouds until they click back into position in the base.

Plug the appliance in to the mains electricity supply and switch on.

Press and hold the Night mode button on the remote control. The display on the appliance will countdown from five, finishing with the default screen. The glass HEPA filter level will be reset and the appliance is ready to use.

Information menu
Scroll through the options to monitor the performance of your appliance.
The menu will also allow you to access information about the pollutants in the air and the temperature and humidity levels.
When a particular type of pollutant causes air quality to decrease, the symbol for that pollutant will show in the display.
Indoor air quality - 12 seconds
Monitor the current air quality with a graph showing the last 12 seconds of data.
Indoor air quality - 24 hours
Monitor the air quality with a graph showing the last 24 hours of data.
Particulate matter (PM2.5)
Microscopic particles up to 2.5 microns in size, suspended in the air we breathe. These include smoke, bacteria and allergens.
Particulate matter (PM10)
Larger microscopic particles up to 10 microns in size, suspended in the air we breathe. These include dust, mould and pollen.
Nitrogen dioxide and other oxidising gases
These potentially harmful gases are released into the air by combustion, for example the burning gas when cooking and in vehicle exhaust emissions.
Volatile organic compounds
VOC’s are typically odours that may be potentially harmful. These can be found in cleaning products, paints and new furnishings.
Indoor temperature
Monitor the ambient temperature to help maintain a comfortable environment.
Indoor humidity
The amount of water vapour in the air, shown as a percentage of the maximum possible humidity at the current temperature.
Filters
The amount of pollution captured by the filters is shown in the display. When the filter is full, the display will flash to remind you which filter needs changing.
WiFi
The current status of connection to the WiFi network.
Using the remote control
To operate, point the remote control toward the front of the base.
On/Off
Press the power ON/OFF button on the appliance or remote control to stop the purifier. The appliance will continue to monitor the air quality.

Airflow speed
Press the Airflow speed button to increase and decrease the airflow speed.

Oscillation On/Off
Press the Oscillation button to scroll through the options from 0 to 350.
Customise your oscillation settings in the Dyson Link app and it will appear as an option as you scroll through.

Information menu
Scroll through the options to monitor the performance of your appliance.
The menu will also allow you to access information about the pollutants in the air and the temperature and humidity levels.
When a particular type of pollutant causes air quality to decrease, the symbol for that pollutant will show in the display.

Auto mode
Set your appliance to Auto mode and the on-board sensors will intelligently adjust the settings of the appliance according to the air quality.
Air quality: your appliance will pause when the target air quality has been reached, switching on again when the air quality levels drop.
Airflow speed: The airflow speed will increase until the target air quality and temperature have been reached.
Night mode: Your appliance will only run with Airflow speeds from 1 to 4.

Airflow direction
Press the Airflow direction button to change the direction of airflow from front to back.
Your appliance will continue to purify in both settings.
Heating mode will only function when the airflow direction is set to the front. If airflow direction is changed to the back, your purifier will change to cooling mode.

Night mode
Night mode will dim the display and the appliance will run more quietly, making it ideal for use while sleeping. If Auto mode has been set, Night mode will reduce airflow speeds to range from 1 to 4. You can manually change the airflow from 1-10. Customise your Night mode settings in the Dyson Link app.

Sleep timer
Your appliance will turn off automatically after the selected amount of time.
To set the time: Press the button to scroll through the time options.
Once activated press the Sleep timer button once to see the time selected.
To cancel the Sleep timer: Press the Sleep timer button twice.

Cooling mode
Press the blue Cooling mode button to enter Cooling mode.
To adjust the airflow speed use the airflow control button or use the auto purification mode for automatic control.

Heating control
Use the heating control to set the desired room temperature. The appliance will then automatically manage the temperature until the target has been reached.

Finding the machine serial number
The serial number and WiFi information can be found in the following locations:
On the front of the user guide.
On a removable sticker on the front of the purifier.
On your purifier, located underneath the filter.
Cleaning the machine
The following areas should be checked and cleaned to maintain the machine's performance:
Clean the loop amplifier with a dry or damp cloth.

Clean the Main body with a dry cloth.

Clean the shroud with a dry cloth or soft brush.
Further help
Dyson Pure Hot+Cool™ HP04 (White/Silver)