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How To Fix A Vacuum That's Lost Suction

How To Fix A Vacuum That Has Lost Suction

When a vacuum loses suction, it's usually due to one of five reasons:

  • Bags/Dust containers

  • Filters

  • Blockages

  • Gaps in the air flow

  • The motor

The Bags/Dust Containers

The easiest solution to fix the suction problem is replacing the bag. Check if your bag is full, as when it is, there will definitely be a loss of suction. However, if your vacuum has lost suction but the bag doesn't seem full, also check for any rips or tears in the bag, as well as it being connected correctly.

The same goes for bagless vacuums in fact. Make sure to empty the container regularly, and make sure it is secured correctly and undamaged.

The Filters

For the filters, usually your vacuum will have two filters. The pre-motor filter is usually located on the bottom, with the post-motor filter on the back. Their job is to protect the motor from any dust and dirt particles.

There are two types of filters: ones that can be replaced, and ones that can be washed.

For the washable ones, you can just rinse them under warm water and then leave to dry for at about 24 hours before putting them back into the machine. After a while however, these will still need replacing as they will become too clogged to wash.

To replace the normal filters, simply order the filters for your make and model of vacuum (and sometimes they will need trimming to the correct size) then simply replace the old ones. Make sure to do this regularly to keep the airflow through your machine strong and powerful, and not clogged up by dirty filters.


If you have checked these two things, yet your vacuum suction is still weak, the next thing to look for is a blockage.

A blockage can occur quite easily in the hose or ducting. For example coins, leaves, or other such debris can get stuck, which can then cause a bigger blockage when dust and dirt builds up around it. Check the hose and ducting to make sure nothing is trapped, as well as the brush roll area.

Gap in the air flow

Still if you haven't found the cause of your problem, the next cause could be a gap in the air flow. Over time, the plastic of your hose can degrade, become cracked, or connections may wear down, causing gaps. Even the smallest holes can cause a severe loss of suction. If you find any gaps, make sure to replace the component to make your machine air-tight once again, restoring the power and capability of your favourite cleaning sidekick again.

The motor

If all else has failed to improve your vacuum, then the most probable cause is then going to be the motor. More specifically, it will be the fault of the carbon brushes that will need replacing. This part has the job of passing power through to the moving component of a motor. With this, the carbon wears down from the continual movement, and therefore after a while will need replacing.

Spare Parts

To find spare parts compatible with your specific vacuum cleaner, you will need the model (type) number. Usually, this is made up of a combination of numbers and letters and can be found on the type plate or sticker found on the bottom or the side of the machine. On our site, if you search with this number, then you will find all the parts we have available that are suitable for your machine.

Get In Touch

Let us know if this has helped you solve your problems on our Facebook. If you have any questions or queries about the spare parts you might need, then feel free to send us an email at, or get in touch with us via our contact form. Remember to include your model (type) number so we can make sure we're searching for the right parts for you. Remember to include your model (type) number so we can make sure we're searching for the right parts for you.

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