An extractor fan pulls grease, steam, and dust through it constantly, which means the filter and cover build up grime faster than most people expect. A dirty fan also works less efficiently, so regular cleaning keeps both performance and air quality up.
How Do You Clean an Extractor Fan?
To clean an extractor fan, turn off the power at the switch, remove the cover and filter, soak metal filters in hot water with degreaser or washing-up liquid, wipe down the housing and fan blades, then dry everything fully before reassembling. Kitchen extractor fans in particular need more frequent attention than bathroom fans, since cooking grease builds up faster than bathroom moisture and dust.
What You Will Need
- A screwdriver, if your fan cover is screwed rather than clipped in place
- A degreasing cleaner or washing-up liquid
- A large bowl or sink for soaking filters
- A soft brush or old toothbrush
- A microfibre cloth
How to Clean a Kitchen Extractor Fan: Step by Step
1. Turn Off the Power
Switch off the extractor fan at the wall or isolate it at the consumer unit if you are removing any covers, both for safety and to avoid the fan starting unexpectedly while you work.
2. Remove the Filter
Most kitchen extractor fans have a removable metal mesh filter, usually released by a simple clip or slide mechanism. Check your specific model’s manual if you are unsure how it releases.
3. Soak the Filter
Soak metal filters in hot water with a degreasing cleaner or a generous amount of washing-up liquid for at least 15 to 20 minutes, since grease responds far better to a proper soak than a quick wipe.
4. Scrub Away Grease
Using a soft brush, scrub the mesh to dislodge softened grease, working into the grid pattern rather than just the surface.
5. Wipe the Housing and Cover
While the filter soaks, wipe down the extractor’s exterior housing and cover with a cloth and degreasing solution, paying attention to any visible fan blades if accessible.
6. Rinse and Dry Thoroughly
Rinse the filter under running water, shake off excess, and dry fully before refitting, since a damp filter refitted straight away can encourage mould in the housing.
Cleaning a Bathroom Extractor Fan
Bathroom extractor fans collect dust rather than grease, so cleaning is generally simpler. Turn off the power, remove the outer cover, and vacuum or wipe away dust from the grille and visible fan blades with a slightly damp cloth, taking care to keep water away from the motor housing.
If your extractor fan is not resolving a wider condensation problem, our guide to reducing condensation on windows covers additional steps worth taking alongside good ventilation.
How Often Should You Clean It?
A kitchen extractor filter benefits from cleaning every one to two months with regular cooking, since grease builds up faster than most people expect. A bathroom fan generally needs cleaning every three to six months, focused mainly on dust removal.
Frequently Asked Questions
How often should I clean my kitchen extractor fan filter?
Every one to two months is generally recommended for regular cooking households, since grease buildup on filters happens faster than most people expect and reduces extraction efficiency.
Can I put an extractor fan filter in the dishwasher?
Many metal mesh filters are dishwasher-safe, but always check your specific manufacturer’s guidance first, since some coatings or materials may not tolerate dishwasher detergent well.
Why is my extractor fan not working as well as it used to?
A grease-clogged filter is one of the most common causes of reduced extraction performance, restricting airflow through the unit even if the motor itself is fine.
Is it safe to clean the fan blades myself?
For accessible fan blades, a careful wipe with a damp cloth is generally safe once the power is off, but avoid dismantling the motor housing itself unless you are confident doing so.
Do bathroom extractor fans need the same cleaning as kitchen ones?
Not quite. Bathroom fans mainly collect dust rather than grease, so a simpler wipe-down and vacuum every few months is usually sufficient compared with the more frequent degreasing a kitchen fan needs.
Always turn off the power before removing any covers or filters, and check your specific extractor fan’s manual for model-specific cleaning guidance.
About the Author
Spire Homes Editorial Team researches and writes practical, UK focused home improvement guides covering renovation planning, financing, interior design, and property maintenance. Our content is reviewed for accuracy and updated as guidance changes.
