DysonUser ManualDyson

Dyson Airstrait

Sections42
Reading7 min
UpdatedApr 2026
LanguageEnglish
Section 01

Getting started

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Section 02

Using your straightener

Your straightener is designed to be used with towel-dried hair, not dripping wet hair. Once towel-dried, detangle your hair with a brush or comb.

Your straightener should never be used without the fan motor on.

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Section 03

Straightening from wet

Before starting to straighten your hair, dry your roots with the arms of your straightener closed. You can use your straightener with the arms locked or just hold them closed.

For the optimum experience, use maximum airflow and a higher temperature, and direct the airflow towards your roots.

Unlock the arms and use the Mode select button to set your straightener to Wet mode.

Your straightener will give you a choice of temperatures that you can change according to your hair type and styling preference. Use lower temperatures for finer hair, and higher temperatures for thicker hair.

Hold your straightener so that the airflow is directed downwards and start to pass sections of hair through the arms. Repeat until each section is dry. Change the airflow and temperature settings as required.

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Section 04

Refresh from dry

Use Dry mode only to refresh your style.

Unlock the arms and use the Mode select button to set your straightener to Dry mode.

In Dry mode, your straightener has a choice of temperatures and an additional Boost when needed.

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Section 05

Cool mode

Use Cool mode to set your style. Hold your straightener with the arms shut and direct the airflow down the hair section to smooth and set.

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Section 06

Adjusting the temperature

Press the Temperature control button to change the setting for your hair type and styling preference.

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Section 07

Boost

Select Boost when styling dry hair for a shot of extra heat.

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Section 08

Idle mode

Between passes, your straightener will activate Idle mode. Airflow will reduce, then increase as soon as you close the arms.

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Section 09

Auto pause

To save energy, your straightener will Auto pause when left for three seconds with the arms open. It will activate again when you pick it up.

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Section 10

Stand-by

To save energy, your straightener will go into standby if left unattended with the arms open for more than five minutes. Press the Power button to re-activate.

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Section 11

How to use your PRCD plug

More than a plug, it’s a Portable Residual Current Device (PRCD). It’s engineered for your safety when using the Dyson Airstrait™ straightener.

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Section 12

Important:

A lwa y s tes t b efore powering on.

Follow the five simple steps below, every time before styling with your machine.

Your step-by-step guide to powering on

1: Plug in Switch on mains power.

Check the RESET button (larger one) is depressed – the red collar should not be visible.

2: Test

Press the TEST button (smaller one).

The RESET button should pop out – the red collar should be visible.

Important:

Do not continue if RESET button doesn’t pop out. Instead, follow the Test Fail guidance, below.

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Section 13

3: Check LED

If there’s no light, proceed to step 4.

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Section 14

Important:

Do not continue if LED lights up or blinks red. Instead, follow the Test Fail guidance, below.

PRCD colours and button positioning might vary.
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Section 15

4: Reset

Press RESET button (larger one) – red collar should not be visible.

5: Power on

Power on your Dyson Airstrait™ straightener.

Style away.

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Section 16

TEST fail guidance

If after pressing TEST and RESET, the RESET button doesn’t pop out (red collar isn’t visible) and/or the LED lights up or is blinking red, do not power on your appliance.

Immediately turn off the main power switch and unplug the appliance, and contact the Dyson Helpline 24/7 chat online at https://www.dyson.com.au/dyson-support and https://www.dyson.co.nz/dyson-support

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Section 17

Settings

Your Dyson Airstrait™ straightener has a settings menu to help you customise your machine to your usage. Press and hold the Mode select button to access the menu on the LCD screen.

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Section 18

Idle mode

You can enable or disable I dle mode on your machine.

Press and hold the Mode select button on your straightener until the menu appears.

Press the Cool mode button to toggle between on and off.

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Section 19

Auto pause

You can prevent your straightener from Auto pausing.

Press and hold the Mode select button on your straightener until the menu appears.

Use the Mode select button to scroll through the menu options. Press the Cool mode button to select and press again to toggle between on and off.

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Section 20

Units

Press and hold the Mode select button on your straightener until the menu appears.

Press the Cool mode button to toggle between ^\circ C and {^\circ} F.

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Section 21

Language

Press and hold the Mode select button on your straightener until the menu appears.

Press the Mode select button to scroll through the language options.

Press the Cool mode button to select the language you want and then press again to confirm. A tick will appear on the screen to confirm your selection.

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Section 22

Factory reset

Press and hold the Mode select button on your straightener until the menu appears.

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Section 23

Cleaning your machine

Your straightener has been precisely engineered. To maintain outstanding styling performance, it needs to be kept free from hair product residue and debris. A little regular maintenance will optimise performance.

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Section 24

Remove the filter

Unplug your straightener and let it cool down before cleaning your filter.

Hold the body of your straightener with one hand and the perforated filter unit with the other. Pull down on the filter unit to release it from the machine and onto the cable.

Gently pull the filter open and slide it off the cable.

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Section 25

Wash the filter

Leave the filter unit to soak in warm, soapy water for at least 30 minutes. We recommend using a clarifying shampoo or dish soap.

Using your fingertips, rub gently to thoroughly clean both the inside and outside surfaces of the filter.

Shake off excess water and leave for 24 hours in a well-ventilated place until completely dry.

Your straightener will alert you if the filter isn’t in place correctly.

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Section 26

Replace the filter

Pull the filter open and slide it onto the cable.

Slide the filter unit towards the machine body, align and click into place.

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Section 27

Cleaning the tension bars

Over time, hair product residue may build up on the tension bars. These bars sit at the top of the inside of each arm and it’s important to keep them clean and free from debris.

Use a soft-bristled toothbrush and a small amount of warm water to brush away any debris. Dry with a clean, lint-free cloth.

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Section 28

Cleaning the diffusers

The diffusers are attached to the sides of the straightener’s arms. We recommend these are kept clean, free from debris and hair product residue. This will keep them functioning effectively.

Ensure machine is switched off then slide the diffusers off the ends of the arms. Use a damp, lint-free cloth to remove any debris and hair product residue. You can also use a soft-bristled toothbrush to remove any stubborn residue.

Refit the diffusers to the arms once clean and fully dry. We recommend that you don’t use your straightener without the diffusers attached.

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Section 29

Deep cleaning the filter

If the filter becomes blocked, you can deep clean it.

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Section 30

Remove filter unit

Unplug your straightener and let it cool down before cleaning your filter.

Hold the body of your straightener with one hand and the perforated filter unit with the other. Pull down on the filter unit to release it from the machine and onto the cable.

Gently pull the filter open and slide it off the cable.

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Section 31

Wipe filter mesh

Wipe the filter mesh with a dry, lint-free cloth to remove any debris.

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Section 32

Soak filter unit

Leave the filter unit to soak in warm, soapy water for at least 30 minutes. We recommend using a clarifying shampoo or dish soap.

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Section 33

Remove inner filter

Remove from the filter cage.

Rub gently, rinse, then dry

Using your fingertips, rub gently to thoroughly clean each part. Rinse both parts of the filter unit to remove any debris.

Allow both parts of the filter unit to air-dry completely or gently wipe with a lint-free cloth.

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Section 34

Replace inner filter

Check that all debris has been removed before replacing the inner filter in the filter cage.

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Section 35

Replace filter unit

Pull the filter open and slide it onto the cable.

Slide the filter unit towards the machine body, align and click into place.

Your straightener will alert you if the filter isn’t in place correctly.

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Section 36

Clean filter

You can continue to use your straightener but we recommend you clean the filter for optimum performance.

Scan the QR code on the screen to help fix this alert or follow the Cleaning your filter instructions above.

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Section 37

Filter blocked

Your straightener won’t operate until the filter is cleaned.

Scan the QR code on the screen to help fix this alert or follow the Cleaning your filter instructions above.

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Section 38

No filter

The filter isn’t fitted correctly or is missing. Your straightener won’t operate until fitted.

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Section 39

Contact Dyson

There is a fault with your straightener. Please contact Dyson.

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Section 40

Volt alert

Your machine has either been plugged into a power source with the incorrect voltage or the voltage is fluctuating.

Plug into a s table, compatible power supply.

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Section 41

Too hot

Your straightener has become too hot and will need to cool down.

Turn off your straightener, unplug and leave to cool down.

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Section 42

Reset

Your straightener has an error. Press the Power button to turn off your straightener and then turn it on again.

If this doesn’t clear the alert, turn off your straightener and unplug from the power source. Plug in and turn on again.

Assistance
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Sourced from Dyson’s official documentation (Australia edition — US edition not published at time of ingestion) and typeset for web reading by Pindear. Always refer to the official source for critical safety information.
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