Support for your Dyson Purifier Hot+Cool™ Formaldehyde

Here you can find helpful tips, video guides, maintenance advice, your user manual and more.

Dyson Purifier Hot+Cool Formaldehyde

Register your purifier

Sign up to My Dyson and register your purifier for instant access to how-to guides, user manuals and more. You can also receive tailored support, direct to your inbox.

Getting started

  • Watch how to quickly get your Dyson Purifier Hot+Cool Formaldehyde up and running with our step-by-step video guide.

Once you have set up your machine, if the sensors are not showing any readings or are showing a zero reading, please follow the steps in the troubleshooting guide below to resolve.

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 app1

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)

manual

Dyson Purifier Hot+Cool™ Formaldehyde User manual

Check your user guide online or download a copy.

8.5MB

How to use your purifier

Understanding the LCD screen icons

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

  • Indoor Air Quality Index screen

    Indoor Air Quality Index (AQI)


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

  • Particulate matter PM2.5 screen

    Particulate matter PM2.5


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

  • Particulate matter PM10 screen

    Particulate matter PM10


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

  • Volatile Organic Compounds screen

    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 screen

    Nitrogen Dioxide (NO2)


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

  • Filter life screen

    Filter life


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

  • Formaldehyde screen

    Formaldehyde (HCHO)


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

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 pollutant levels screen

    Fair


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

  • Poor pollutant levels screen

    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 pollutant levels screen

    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

  • Activate Auto mode


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

  • Oscillation and airflow


    Watch our video guide on how to customise the angle, speed and direction of airflow.

  • 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 app1

  • 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 controls

    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.

Works with smart voice control

Control your Dyson purifier with your voice.2

  • Amazon Alexa


    Ask Alexa to enable the Dyson skill, to control your Dyson purifier. And set a routine that automates how your machine works with other devices in your home.

  • Google Home


    Just say “Hey Google” and you can use Google Assistant to control all your connected purifiers. Or set a routine to automate how your machine works with other devices in your home.

  • Siri Shortcuts


    Connect your Dyson machines to Siri Shortcuts and you’ll be able to control them with your voice, on your Apple device.



Some things you can say:

When you've connected your Dyson purifier to your
voice assistant, you could try saying:

"Alexa, turn on my Dyson machine"
"Hey Google, turn up the temperature"
"Hey Siri, enable Auto mode"

Maintaining your purifier

  • To ensure optimum air purification performance, we recommend replacing your HEPA+Carbon filter every 12 months.3 Your Catalytic filter doesn’t need replacing.

Frequently asked questions

Increasing airflow will create a cooling effect using purified air, so you may find it beneficial to change your purifying fan heater'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.

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.

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 purifying fan heater will remain idle until pollutant levels rise.

Your purifying fan'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.

Your purifying fan heater 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 metres of clearance on all sides so that the air can circulate effectively.

Your purifying fan heater 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.

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

The Dyson guarantee

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    'How to' videos

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

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    Helpful tips

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

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    Exclusive owner benefits

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

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    Expert advice. 7 days a week.

    Freephone and live chat. Open 8am - 8pm Monday to Friday, 8am - 6pm Saturday and Sunday.

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    Free Dyson parts and labour

    Replacement parts or repairs if something goes wrong during your guarantee period.

  • Hassle-free replacement Logo

    Hassle-free replacement

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

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

1 Requires device to run app, Wi-Fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply.

2 Refer to the Dyson Link app for compatible voice services.

3 Based on 12 hours use a day