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Support for your Dyson Purifier Cool Formaldehyde

  • Activate your warranty

    You can get support that's tailored to you, owner exclusives and more when you register your machine.

  • Getting started

    Watch how to quickly get up and running with our step-by-step video guide.

  • Dyson Purifier Cool Formaldehyde purifier and filters
    Open video transcript

Connecting your purifier

Follow these three steps to connect your purifier to the Dyson Link app.¹

  • Phone with app on screen

    Step 1

    Download the Dyson Link app to your mobile device, open and select 'Add machine' from the menu. Then select your purifier.

  • Phone held next to purifier

    Step 2

    Hold your device next to your purifier's LCD screen. This will allow your machine to detect your mobile device.

  • Pressing the Standby button

    Step 3

    Press the Standby button on your purifier to activate the pairing process. Then follow the on-screen instructions to complete connection set-up.

Get more from your purifier with the Dyson Link app

The Dyson Link app lets you control your air purifier – wherever you are. You can turn it on or off, adjust the settings, change modes or check air quality remotely. If you haven't already, download the app now for extra features and the latest updates.

Dyson Link app rated 4.2 out of 5 (average as of May 2020)

How to use your purifier

Understanding the LCD screen icons

The icons on your LCD screen show which pollutants are present, reporting in real time. The icons also tell you about temperature, humidity and filter life.

  • Indoor Air Quality Index (AQI)

    Shows your air quality over the last 12 seconds, or over the last 24 hours. 

  • Particulate matter PM2.5

    Shows microscopic particles smaller than 2.5 microns, including smoke, bacteria and allergens.

  • Particulate matter PM10

    Shows particles smaller than 10 microns, including pollen, dust and pet dander.

  • Formaldehyde (HCHO)

    Shows particles of formaldehyde, a volatile gas that can emit for years from household flooring and furniture.

  • Volatile Organic Compounds (VOCs)

    Shows gases released from a wide range of sources, such as aerosol sprays and air fresheners. They include benzene, household fumes and odours.

  • Nitrogen Dioxide (NO₂)

    Shows oxidizing gases such as NO₂, released by combustion. Includes cigarette smoke, car emissions, candles and gas stoves.

Filter life

Shows how much filter life remains on the HEPA+Carbon filter. So you know when to replace it.

Understanding pollutant levels

When a pollutant reduces your air quality, its icon appears on screen. In this case, PM10. The coloured bar on the left indicates how much of the pollutant is present, and will continually update as the machine purifies your air.

  • Good pollutant levels screen

    Good

    When the green section of the coloured bar is highlighted, your purifier is detecting a very low level of the type of pollutant.

  • Fair

    When the yellow section of the coloured bar is highlighted, your purifier is detecting a moderate level of the type of pollutant.

  • Poor

    When the orange section of the coloured bar is highlighted, your purifier is detecting a high level of the type of pollutant.

  • Very poor

    When the red section of the coloured bar is highlighted, your purifier is detecting a very high level of the type of pollutant.

Using the remote control

Colour and Model shown may vary

  • Video - how to activate auto mode

    Activate Auto mode

    Select Auto mode and your on-board sensors will intelligently adjust settings according to your air quality.

  • Video - how to set oscillation angle

    Setting the oscillation angle

    Watch our video guide on how to customise the angle of oscillation for your machine. Choose from a range between 45° up to 350°.

  • Video - how to adjust the airflow

    Adjusting the airflow

    Both the speed and direction of airflow can be adjusted. For powerful, personal cooling from the front, or diffused air diverted through the back of the machine.

  • Video on using Auto mode, heating and cooling

    Sleep timer and Night mode

    Set the Sleep timer to turn your purifier off, or use Night mode for the quietest settings and a dimmed screen.

Using the Dyson Link app

  • App scheduling

    Set and forget

    View real-time or historic air quality data wherever you are, or set and forget with advance 7-day scheduling.

  • App home screen

    Instant control

    Your primary controls are now instantly accessed on the home screen, including power, fan speed and temperature.

  • App help section

    Help is at hand

    Not sure what NO₂ or VOCs are? Find instant answers to air quality questions in our app's help section.

Voice control. All you have to do is ask.

Using your purifier heater is even quicker and easier with a compatible voice service like Amazon Alexa, Google Assistant or Apple's Siri. You can enable the Dyson skill, or set this up via the Dyson Link app. Find out more about voice control.

Try using these voice commands:

"Alexa, ask Dyson to increase fan speed."

"OK Google, ask Dyson to start oscillating."

"Hey Siri, ask Dyson to turn on Night mode."

  • Logo Amzon d"Alexa et Siri d'Apple
  • Maintaining your purifier

    To ensure optimum air purification performance, we recommend replacing your HEPA+Carbon filter every 12 months. Your Catalytic filter never needs replacing.

  • Fitting the filter
    Open video transcript

Frequently asked questions

Should I change the fan settings in different seasons?

Increasing airflow will create a cooling effect using purified air, so you may find it beneficial to change your purifier's speed settings as the temperature changes. For personal cooling in summer, use settings 4-10. In colder periods, enable diffused mode. It projects air through the back of the machine, to avoid unwanted cooling.

Does the LCD display stay on throughout the night?

If you're concerned by the brightness of your purifier's LCD display, consider enabling Night-time mode using your remote control or the Dyson Link app. During operation, a small moon icon indicates that your purifier is on, but the main display turns off after 10 seconds to help avoid sleep disturbance.

How do I know when my purifier is in Auto mode?

If auto mode is enabled, AUTO will be illuminated on your purifier's LCD display. When your machine is purifying the air, AUTO will be in white. When the air in the room is purified, it will turn green and your purifier will remain idle until pollutant levels rise.

How long should my purifier be turned on for?

Your purifier's auto mode is designed to manage the air quality in your home without you having to operate the machine – so it's only on when it needs to be. If you or someone in your home suffer from allergies or respiratory illnesses, we particularly recommend using your machine's auto mode.

Where should I place my purifier?

Your purifier is engineered to purify single rooms, so you should use it where you spend the majority of your time at home. When placing the machine, make sure there is at least a few feet of clearance on all sides so that the air can circulate effectively.

Should I keep my windows open or closed?

Your purifier works most efficiently in a sealed environment – opening the windows can allow more pollutants to enter the air in your home, which means your machine will take longer to work.

How often do the filters need to be changed?

The HEPA+Carbon filter needs to be changed after 12 months, based on 12 hours’ use a day. The Dyson Catalytic filter is permanent, so you don’t need to change it.

The Dyson warranty

  • 'How to' videos

    To help you get the most from your machine. Quick and easy.

  • Helpful tips

    Tailored reminders that will keep your machine working at its best, for longer. 

  • Exclusive owner benefits

    Priority access to previews of new Dyson technology, events and offers. 

  • Expert advice. 6 days a week.

    Telephone toll-free, email or live chat. The right advice for your machine, from real Dyson people.

  • Free Dyson parts

    Replacement parts if something goes wrong during your warranty period.

  • Hassle-free replacement

    If we can’t repair your machine, we’ll replace it while it's under warranty.

We don’t stop caring about our machines once they’re yours. Activating your warranty allows us to give you a tailored, direct service for your machine. Even after your warranty has ended, we’ll still be on hand to help.

¹Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 11 or Android version 6 (or above). Standard data and messaging rates may apply.

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