Where Dyson vacuums clog and how to find the blockage
A Dyson loses suction when air cannot flow freely through the machine, and the blockage is almost always in one of three places: the brush bar (the spinning roller at the bottom), the filter, or the hose. Start by checking these in order, because the brush bar clogs most often and is the easiest to clear.
Before you begin, unplug the vacuum from the wall. Turn the machine upside down and look at the brush bar — the long roller that spins across the floor. If you see hair wrapped around it or packed debris, that is your clog. If the brush bar looks clear, move to the filter next. On most Dyson uprights, the filter is a cylindrical cartridge near the top of the machine; on cordless models, it is usually on the side. Hold it up to a light and look through it. A clogged filter will look dark or matted, not light and porous. If both the brush bar and filter are clear, the hose is likely blocked — you will need a straightened wire coat hanger or a plumbing snake to check it.
Key Takeaways
- The brush bar, filter, and hose are the three places where Dyson vacuums clog, and you should check them in that order.
- Wrap hair around a comb or old credit card to pull it from the brush bar, then wipe the bar with a damp cloth.
- Wash the filter under running water until the water runs clear, and let it dry completely before reinstalling it — a wet filter will damage the motor.
- If the hose is blocked, feed a straightened coat hanger through it or run warm water through it to dislodge the clog.
- Clean the brush bar every month and the filter every three months to prevent clogs from forming in the first place.
Clearing hair and debris from the brush bar
The brush bar is the easiest blockage to fix. Turn the vacuum upside down and look for the release button or latch on either end of the brush bar — most Dyson models have one on each side. Press or slide both latches and the brush bar will slide out. You may need to unscrew a single screw on some older models; check your manual if the bar does not slide free.
Once the brush bar is out, use an old credit card, a comb, or a seam ripper to scrape hair and lint away from the bristles. Work along the length of the bar, pulling the debris toward you. Wrap long hair around the card and pull it off in one motion — this is faster than picking at individual strands. Wipe the bar down with a damp cloth and let it dry, then slide it back into place until you hear or feel it click.
Washing the filter to restore airflow
A clogged filter is the second most common reason for lost suction. Dyson filters cannot be replaced as often as filters in other vacuums, so you need to wash yours instead. Locate the filter — on uprights it is usually a tall cylinder near the motor housing; on cordless models it is often on the side. Press the release button and twist or pull the filter free, depending on your model.
Hold the filter under a running tap with lukewarm water. Do not use hot water, which can damage the filter material. Tap the filter gently against the inside of your palm while water runs through it, working from the clean side toward the dirty side. Keep rinsing until the water runs clear. This can take two to three minutes. Shake out excess water and stand the filter upright on a clean cloth to air dry completely — this usually takes at least four hours, but overnight is safer. Never reinstall a wet filter; water on the motor will cause it to fail. Once it is bone dry, twist or push it back into place.
Unclogging the hose with a wire or water
If the brush bar and filter are both clear, the hose is blocked. Disconnect the hose from the main body of the vacuum — most Dyson hoses twist or pull free. Hold the hose up to a light and look through it. You may see a blockage, or the hose may look clear but still be partially blocked by something you cannot see.
The fastest way to clear it is to run warm (not hot) water through the hose over a sink or bathtub. Let the water flow through for 30 seconds. If that does not work, straighten a wire coat hanger and feed it through the hose slowly, pushing any debris ahead of it. Work from both ends if you can. Once the hose is clear, shake out excess water and let it dry before reattaching it to the vacuum.
Checking the cyclone and dust bin connection
A less obvious clog can form where the dust bin connects to the cyclone — the part that spins air to separate dust from the airflow. If you have cleared the brush bar, filter, and hose and suction is still weak, this connection may be blocked.
Empty the dust bin completely and twist or pull it away from the cyclone. Look at the opening where the bin connects to the cyclone. You may see dust caked around the rim or blocking the opening. Wipe this away with a damp cloth. Also check the cyclone itself — the cone-shaped part above the bin — for dust buildup. A soft brush or old toothbrush works well for this. Reattach the bin and test the suction.
Preventing clogs before they start
The best way to deal with a clog is to stop it from forming. Clean the brush bar every month, especially if you have pets or long hair in your home. This takes five minutes and prevents the kind of wrapped hair that kills suction. Wash the filter every three months, or more often if you have pets or allergies. A clean filter makes the motor work less hard and extends the life of the machine.
Empty the dust bin when it reaches the fill line, not when it is completely full. A full bin restricts airflow and makes clogs more likely. If you vacuum a lot of pet hair, consider emptying it more often. Check the hose once a month by holding it up to a light — you will catch blockages early before they become a problem.
When to call a professional or contact Dyson
If you have cleared the brush bar, washed the filter, unclogged the hose, and checked the dust bin connection and suction is still weak, the problem may be inside the motor housing or in the motor itself. This is not something you can fix at home. Contact Dyson customer service with your model number — you can find it on a sticker on the machine or in your manual. They can tell you whether the machine is still under warranty and what your repair options are.
If the brush bar does not spin after you reinstall it, or if you hear a grinding noise when the vacuum is on, stop using it when ready. These are signs of motor or bearing damage, and running the machine will make it worse. Again, contact Dyson support.
Frequently Asked Questions
How often should I clean my Dyson filter?
Wash the filter every three months under running water. If you have pets, allergies, or use the vacuum daily, wash it every month instead. A clogged filter is the most common reason for lost suction, so regular cleaning prevents most clog problems.
Can I use a vacuum cleaner to clean the filter?
No. Use only water and your hands or a soft brush. A vacuum can damage the filter material. Tap the filter gently against your palm while rinsing to loosen trapped dust.
What if water comes out of the vacuum after I unclog the hose?
You used water to clear the hose. Shake the hose hard over a sink or bathtub to remove excess water, then stand it upright to drain. Let it dry for at least an hour before reattaching it. If water is still dripping, wait longer — a wet hose can damage the motor.
Is it normal for a Dyson to lose suction over time?
Some loss of suction is normal as the filter gets older, but regular cleaning slows this down. If your vacuum is more than five years old and suction does not improve after cleaning the filter and brush bar, the filter material may be wearing out and replacement filters are available from Dyson.
Can I use a plunger on the hose to clear a blockage?
A plunger can work if the blockage is near one end of the hose. Cover one end with the plunger cup and push and pull sharply several times. A wire coat hanger or plumbing snake is usually faster and safer, because a plunger can sometimes push the blockage deeper into the hose.