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Support for your Dyson V12 Detect™ Slim vacuum

Here you can find helpful tips and advice, how-to videos, your user manual and more.

Dyson V12 Detect Slim vacuum cleaner
Here you can find helpful tips and advice, how-to videos, your user manual and more.

User manual

User manual

Download the user manual for your Dyson V12 Detect Slim™ vacuum cleaner.

User manual


Getting started

Getting started

If you haven't already, watch our quick-start video and register your machine in our getting started section.

Register your machine

Register to activate your guarantee for instant access to how-to guides, user manuals, and more. You can also receive tailored support, straight to your inbox.

Watch the quick-start video

Our video shows you how to assemble and set up your vacuum so it's ready to use4.

Video showing how the vacuum is set up

Charge before first use

It's important to charge the battery before using your vacuum for the first time. This helps the battery monitoring system's algorithm more accurately calculate remaining run time.

Video showing how to charge the battery

Video showing how to charge the battery

LCD screen

Getting to know your LCD screen

During cleaning, your LCD screen displays the power mode and remaining run time in a second-by-second countdown, which constantly updates in real time, according to the power mode selected.

¹Best accuracy achieved in Auto mode. Auto ramp feature in Auto mode only. Testing based on average in home usage according to Dyson internal test data. Microscopic dust is defined as particles less than 100 microns.

FAQs about the particle count graph

In Auto mode, the motor – which controls suction power – intelligently reacts to the amount of dust detected to provide a deeper clean, automatically. More dust, more power. Adjusting the motor sensitivity in the settings menu affects how responsive your machine is to the level of dust detected. Set to ‘High’, and your machine will react more often, and provide more suction power, when a smaller concentration of dust is detected. Set to ‘Low’, and suction power will react less often, and to larger amounts of dust. To change the motor sensitivity, hold the selection button beneath the LCD screen to enter the settings menu. Then tap the button to scroll through to the motor sensitivity settings. Hold to select, then choose your preferred setting.

Yes. The graph works independently of the attachments, and can be used with all cleaner heads, tools and accessories.

To reset the particle count, either charge your machine (the count will reset after 30 minutes of charging) or remove the click-in battery for 15 seconds before replacing. The vacuum can be purged of any residual dust in the cleaner head or wand by activating suction away from any surface for 10 seconds.

While we can measure particles as small as 0.1 microns in the lab, it’s not yet possible to fit these measurement technologies into a vacuum cleaner. What we can't yet detect with our piezo sensor, we can filter out. Our HEPA filter media can capture 99.97% of particles down to 0.1 microns in size.

Your LCD screen also displays

Settings, alerts and notifications

To enter the settings menu, hold the selection button. Tap the button to scroll through the options, hold to select. Press the power button at any time to start vacuuming.

Alerts and notifications

Power modes

Getting to know your power modes

Your vacuum has three power modes, each designed for different tasks. Change power mode quickly by tapping the selection button.

  • LCD screen showing Auto/Med mode

    Auto/Med mode

    The optimum balance of power and run time. Med mode applies when a non-powered tool is attached.

  • LCD screen showing Eco mode

    Eco mode

    Maximum run time, for longer cleans all around your home.

  • LCD screen showing Boost mode

    Boost mode

    For the toughest tasks. Designed for quick, intensive cleaning of ground-in dirt.

FAQs about power modes and LCD screen

Both modes provide the optimal balance of power and run time. Auto mode works with all cleaner heads and the Dyson Hair screw tool, and automatically adjusts suction power to match the level of dust detected. Med mode is displayed instead of Auto mode when non-powered tools are attached, e.g. the Crevice tool.

Hold the selection button to enter the settings menu. Hold the ‘Select language’ option to view the languages available. Tap the button to scroll through the list. When you reach your preferred language, hold the button to select. If you select the wrong language, release the button before the countdown ends. To confirm the language, hold the button until the countdown ends.

The LCD screen only uses up to 1.5 watts of power, which won't noticeably impact run time.

Cleaner heads

Getting to know your cleaner heads

You can use two different Dyson-engineered cleaner heads with your Dyson V12 Detect Slim™ vacuum.

  • Learn more about the Illuminated cleaner head

    Laser Slim Fluffy ™ cleaner head

    Hard floor specialist. 25cm-wide cleaner head with soft nylon and anti-static carbon fibre filaments removes fine dust from hard floors and narrow gaps. With a low profile to reach further under furniture.

  • Motorbar cleaner head picking up dust on carpet

    Motorhead™ cleaner head

    De-tangling vanes automatically clear wrapped hair from the brush bar as you clean. The integrated motor drives stiff nylon bristles into carpets to capture ground-in dirt.

FAQs about cleaner heads

The angled beam is optimised to work on any smooth, hard floor – including white surfaces and wood laminate. The angled beam is visible in up to roughly 500 lux ambient light – about the same as a well-lit kitchen space. Direct sunlight is in the order of 10,000+ lux and not possible to outshine.

The human eye has evolved to be more sensitive to green light than any other colour, helping to enhance contrast and revealing more invisible dust.


Yes. The laser can be turned on or off using a slide button on the cleaner head.

This is a hard floor only technology. The angled beam effect does not work on carpet, and would not be useful on the Motorbar™ cleaner head.


Handheld cleaning in the car

Powerful 3-in-1 cleaning

In just one click, your vacuum transforms to a mattress cleaner. It can also be used as a handheld cleaner, with a choice of accessories to clean hard-to-reach areas all around your home.

Handheld cleaning in the car

Dyson-engineered accessories

Our accessories add even greater versatility. Each can be attached to the wand for cleaning up high, or directly to your machine for handheld cleaning.

  • Awkward gap tool showing flexibility

    Awkward gap tool

    Long and narrow, with a 22° twist to clean car storage compartments, tight gaps and hard-to-reach places.

  • Scratch-free dusting brush

    Scratch-free dusting brush

    Gentle on delicate surfaces. Self-cleaning – a rotating cuff keeps the soft bristles clear of dust.

  • Pet Grooming Kit

    Pet Grooming Kit

    Captures loose hair as you brush your pet. Flexible bristles self-clean in an instant. For medium and long haired pets.

  • Hair screw tool picking up hair

    Hair screw tool

    Picks up long hair and pet hair. Fast. Anti-tangle conical brush bar spirals hair off and into the bin. Motor-driven cleaning for small spaces.

  • Light pipe crevice tool picking up dust

    Light pipe crevice tool

    Crevice tool with LED lights lets you reach into dark, narrow spaces and see where you’re cleaning.

  • Reach-under tool underneath furniture

    Reach-under tool

    Bends to comfortably reach down low. Engineered to clean further under furniture by adjusting the wand angle up to 90°.

  • Crevice tool picking up dust

    Crevice tool

    Engineered for precise cleaning around tricky edges and into hard-to-reach narrow spaces.

  • Flexi crevice tool showing flexibility

    Flexi crevice tool

    Extends and bends to reach awkward narrow spaces where dust settles around your home and car.

  • Combination tool vacuuming dust

    Combination tool

    Two tools in one – wide nozzle and brush, for quick switching between cleaning and dusting tasks around your home or car.

  • Soft dusting brush cleaning upholstery

    Soft dusting brush

    For vacuum-assisted dusting of screens and surfaces. Soft bristles lift dust from delicate surfaces.

  • Mattress tool cleaning a mattress

    Mattress tool

    Removes dust, dirt and allergens from mattresses, futons and upholstery.

  • Stubborn dirt brush loosening and picking up dust

    Stubborn dirt brush

    Stiff nylon bristles dislodge ground-in dirt from coarse carpets, high traffic areas and car interiors.

  • Up-top adaptor vacuuming high places

    Up-top adaptor

    Bends and locks at different angles. Fits any compatible tool for effective cleaning in hard-to-reach high areas of your home.

  • Extension hose adding greater reach

    Extension hose

    Adds up to 61cm of flexible reach to any tool attachment, to clean up high or down low in your home or car.

  • Quick-release adaptor

    Quick-release adaptor

    Attaches older Dyson universal-fit tools to our newer machines with quick-release catches.


How to set up your Floor dok

You can use the floor dok to store your vacuum, so it's always on hand and ready to use. Watch how.

Woman placing the Dyson V15 Detect vacuum on the wall dock


Charging the battery

You can charge your battery on or off the machine, and on or off the wall dock/floor dok.

Dyson V12 Detect Slim charging

Changing batteries

If you have an additional battery3, you can achieve up to 120 minutes run time in Eco mode. Swap batteries quickly by pressing the red Battery release button.

Changing batteries on the Dyson V12 Slim vacuum

FAQs about the battery

A full charge takes up to 3.5 hours.

Run time is displayed on the LCD screen, and your machine will pulse three times to alert you if it's getting low.

Yes, your swappable battery packs can be charged on or off your machine, on or off the dock.

We recommend alternating your batteries regularly to prolong battery health.

Yes, the battery is designed to be left on charge, to ensure your vacuum is ready for the next use.

We recommend charging your machine after every clean to maximise run time.


Maintaining your machine

How to clean your vacuum

Cleaning removes dust build-up and helps optimise performance. The filter and brush bar in the Illuminated cleaner head can be washed, and the bin and tools wiped clean.

Washing parts of the vacuum


Why it's important to clean your filter regularly

The filter captures microscopic dust, which can accumulate and affect performance. Help maintain suction by washing the filter at least once a month, or more frequently if used heavily.

How to clean your filter

It's important to clean your filter regularly, because it captures microscopic dust, which can accumulate and affect performance. Help maintain suction by washing the filter at least once a month, or more frequently if used heavily.

  • Removing the filter

    1. Remove your Dyson filter

    Remove your filter by unscrewing the post-motor filter from the machine.

  • Removing excess dust

    2. Remove excess dust

    Tap your filter lightly on the side of the sink or in the bin, to remove any loose dust and debris.

  • Rinsing the filter with water

    3. Rinse filter

    Wash your filter with warm tap water – gently rubbing it with your hands. Don't use detergents.

  • Shaking the filter to remove excess water

    4. Give it a firm shake

    Fill your filter with warm tap water. Cover the open ends with your hands and shake firmly to remove the dirt. It's important not to agitate the filter media, i.e. the pleated elements. Repeat until the water runs clear, and then firmly shake the filter to remove all excess water.

  • Filter left to dry

    5. Leave to dry for 24+ hours

    After washing your filter, leave to dry for at least 24 hours in an area with plenty of airflow, such as beside a fan or open window. When drying, position the filter with the larger end on the surface. Your filter must be completely dry before you put it back into the machine, or it could damage the motor. Don't dry in a tumble dryer, microwave or near a naked flame.


Don't overfill the bin

Overfilling the bin can reduce suction and affect the accuracy of the particle count. To maintain suction, empty as soon as debris reaches the MAX marker.

Emptying the bin on the Dyson V12 Detect Slim vacuum

Removing blockages

Your LCD screen will alert you if there's a blockage in your machine's airways. On-screen animation shows you which airflow pathways to check4.

Removing blockages from the airways

Washing the Dyson Laser Slim Fluffy™brush bar

You can wash your Illuminated cleaner head's brush bar in warm water.

Image showing brush bar being washed

FAQs about maintenance

Your machine will pulse seven times to alert you if there’s a blockage. You can follow the animated guide on your LCD screen to clear it.

The LCD screen on your machine will remind you when it's time to clean your filter. This will usually be around once a month, but may be more frequent if you use your machine more heavily. After cleaning the filter, always leave it to dry for at least 24 hours. You must ensure it's completely dry before refitting. We recommend following the cleaning instructions and cleaning by hand. The filter is not suitable for dishwasher use.

Your machine works independently and doesn't currently connect to the MyDyson™ app.

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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 Quantity and size of dust displayed on screen varies depending on usage. Examples shown may occur within one or more displayed size range.

2 Quantity and size of dust displayed on screen varies depending on usage. Automatic suction adaptation only occurs in auto mode.

3 Additional battery available to buy separately.

4Small details may vary