Dyson DC40 vacuum | Dyson DC40 upright vacuum | Dyson

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Getting started

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Using your machine

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Maintaining your machine

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Resetting the brush bar

The brush bar is designed to shut off when jammed. Learn how to reset it after removing the cause of the jam.
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Checking for blockages – wand and hose

Follow our step-by-step guide to check for blockages.

Useful tips

Safely store tools

Clip accessories onto the vacuum's tool holster so you've always got them to hand.
Wash the filter regularly

Rinse under a cold tap until the water runs clear – you don't need any detergents. Leave to dry fully (at least 24 hours) before refitting.
Don't overfill it

To maintain suction, keep an eye on the bin and empty it as soon as debris reaches the MAX marker.

User manual

Check your user manual online or download a copy

Frequently asked questions

How often do the filters on this machine need washing?

We recommend that you check both of the filters at least once every 3 months. You can find filter maintenance instructions in the machine's user guide.

Can I use this machine with an extension cable?

No, the use of an extension cable is not recommended.

Can I use this machine to pick up liquids?

No. Don't pick up water or other liquids with your machine.

Tools to tackle more

Articulating hard floor tool

Articulating hard floor tool

Part No. 920019-01

Soft nylon bristles gently remove dust. Ultra-slim profile reaches into awkward gaps.

Out of stock

£25.00

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Dyson groom

Dyson groom

Part No. 921001-01

Comfortable, mess-free grooming for medium- and long-haired dogs. Fine bristles grab loose hairs, then release them into the bin.

£35.00

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Flat out head

Flat out head

Part No. 914617-01

An ultra-low profile head for cleaning under sofas, beds and kitchen appliances.

Out of stock.

£35.00

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The Dyson guarantee

'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. 7 days a week.

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

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

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Contact us

You can quickly access help and advice online – visit our support pages for troubleshooting, how-to videos and more.

Our helpline opening hours:

08:00 – 20:00 Monday to Friday
08:00 – 18:00 Saturday and Sunday

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Call us on 0800-298-0298