How To Clean A Kitchen Exhaust Fan
18th May 2024 | Written By: Vinod Pottayil | Read Time: 4min | Last Updated: 09th April 2026
The exhaust fan in your kitchen works tirelessly, to remove the warm air and odour out of your kitchen. It’s a necessary appliance both in your home kitchens and professional restaurant kitchens. You could use either a chimney exhaust fan which is capable of doing this, or it could be a simple wall-mounted kitchen exhaust fan. In either of the cases, it’s important to clean the kitchen exhaust fan at regular intervals, to keep it healthy and running well.
Today, we bring you 7 steps on how to clean the kitchen exhaust fan. A small DIY project, to give your kitchen exhaust fan the spa treatment it deserves.
Things required to clean a kitchen exhaust fan
Before we start the cleaning process, here are some things to prepare:
Cleaning Gear
- Liquid Soap
- Degreaser
- Baking Soda
- Vinegar
- Lemon Juice
(Note: You can use any of the above)
Safety Gear
- Gloves
- Mask
- Goggles
Tools & More
- Screwdriver
- Old Toothbrush / Sponge
- Owner’s Manual
- Sink / Bucket
- Disconnect: Disconnect the fan from the mains. This is an important step to clean your exhaust fan safely. If your fan connects with a plug, unplug it from the socket. If the fan is directly connected to the switchboard, turn off the kitchen power supply.
If your fan has been running recently, let it cool down completely, before you proceed with the next step. - Remove the fan filter / fan casing: Depending on the type and make of your exhaust fan, you would remove the outermost layer of the exhaust fan. For a chimney exhaust fan, this would be a fan filter that sits on top of the exhaust assembly. For a window or wall exhaust fan, this could be the fan casing that covers the fan impeller.
You can use a screwdriver as a wedge to help you remove the filter / casing. In some fans, there are visible screws that need to be removed, to remove the casing. - Remove any visible debris: You may find layers of visible dust or debris accumulated on the fan assembly. Use a microfiber cloth in a sweeping motion to remove the dust accumulated. Clean in and around the area where the fan is fitted.
This step will be relevant especially if it has been a long time cleaning the fan, or if the fan or the house was not used for a long time. - Clean the fan filter / fan casing: Immerse your fan filter or fan casing in a large sink, basin or bucket filled with warm water and a few drops of liquid soap or degreaser. If you see too much accumulated debris, it’s a good idea to rinse it with running water, to remove the bigger chunks of debris before a complete immersion. Keep this immersed for 10 to 15 mins.
Then use an old toothbrush or sponge to clean the filter or the casing. Rinse under running water to wash off all the dirt and then leave it to air dry. - Clean the fan blades: It’s time for cleaning the exhaust fan blades now. Check if you can remove the fan impeller. Most fans have a locking screw mechanism, which needs to be unscrewed. This is an optional step, and if you do not find a lot of debris inside the fan, you can skip the fan removal.
Whether the fan is removed or not, the fan blades can be cleaned with a wet cloth dipped in the cleaning solution. Do not spray cleaning solution directly on the fan blades. It can result in the fan assembly picking up the moisture and possibly malfunctioning.
Check if the fan is freely moving, and if there is any wobbling or obstruction in its motion. You can add some grease or lubricating oil near the shaft of the fan, based on your manufacturer’s recommendations to make it turn freely. - Assemble the fan: Assemble the fan back, starting with the fan impeller and blades, if these were removed, and later the fan filter / fan casing. Make sure all the removed parts are dried before you assemble the fan, to prevent any residual moisture on the fan parts.
- Connect and Check: Connect to the mains. Plug in / turn on the mains, and check if it runs fine. Cleaning the exhaust fan makes the fan visibly operate better, at a higher speed and with less noise.
How Often Should You Clean Your Kitchen Exhaust Fan?
You should clean your kitchen exhaust fan every 2–4 weeks, depending on how frequently you cook and the type of food prepared. Homes with regular frying or oily cooking may require more frequent cleaning to prevent grease buildup, which can affect performance and hygiene. To clean the exhaust fan, first switch off the power and unplug the unit. Carefully remove the outer cover and filters, and soak them in warm water mixed with a mild detergent or degreasing solution. Gently scrub away grease and grime using a soft brush or sponge, then rinse and let them dry completely. Wipe the fan blades and motor housing with a damp cloth—avoiding excess water near electrical components. Once everything is dry, reassemble the parts and restore power. Regular cleaning ensures better airflow, reduces odour, and extends the life of your exhaust fan.
Best Cleaning Agents and Solutions for Kitchen Exhaust Fans
The best cleaning agents for kitchen exhaust fans are those that effectively cut through grease while remaining safe for regular use. For heavy grease buildup, commercial degreasers are highly effective, as their specialised formulas quickly dissolve stubborn oil and grime from blades and filters. For routine cleaning, simple solutions like warm water with dish soap, baking soda, or white vinegar work well to break down light grease and remove odours without harsh chemicals. Using a combination of these—degreasers for deep cleaning and mild solutions for regular maintenance—helps keep the exhaust fan clean, hygienic, and performing efficiently over time.
Safety Tips While Cleaning Kitchen Exhaust Fans
When cleaning a kitchen exhaust fan, safety should always be a priority to prevent accidents and damage. Always switch off the power supply and unplug the unit before starting to avoid any risk of electric shock. Allow the fan to cool down completely, especially if it has been in use. Use a stable stool or ladder if the fan is mounted at a height, and ensure proper balance while cleaning. Avoid excessive water near electrical components, and never spray cleaning solutions directly onto the motor. Wear gloves to protect your hands from grease and cleaning chemicals, and use non-abrasive tools to prevent damage to surfaces. Ensuring these precautions will help you clean your exhaust fan safely and effectively.
Common Problems During Cleaning and How to Avoid Them
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Fan Wobbling or Not Turning Freely
Fan Wobbling or Not Turning Freely is a common issue encountered during or after cleaning a kitchen exhaust fan. This usually happens when the blades are not reassembled correctly, screws are left loose, or grease residue remains unevenly distributed on the blades. It can also occur if the blades get slightly bent during cleaning. To avoid this, ensure all parts are cleaned evenly and thoroughly dried before reinstallation. Carefully tighten all screws and fittings, and make sure the blades are aligned properly and not damaged. After reassembly, rotate the blades manually to check for smooth movement before switching the fan on. Regular maintenance and careful handling can help prevent this issue and ensure optimal performance.
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Excess Moisture Causing Malfunction
Excess Moisture Causing Malfunction is a common issue when cleaning kitchen exhaust fans, especially if water seeps into electrical components like the motor or wiring. This can lead to short circuits, reduced performance, or complete failure of the unit. To avoid this, always use a damp cloth rather than excessive water, and never spray cleaning solutions directly onto the motor housing. After cleaning, ensure all parts—especially internal components—are completely dry before reassembling and restoring power. Allow sufficient drying time or use a dry cloth to remove any residual moisture. Taking these precautions helps maintain safety and ensures the fan operates efficiently without damage.
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Dust or Grease Build-up Issues
Dust or Grease Build-up Issues are one of the most common problems in kitchen exhaust fans, leading to reduced airflow, unpleasant odours, and increased strain on the motor. Over time, layers of oil and dust accumulate on the blades, filters, and vents, affecting overall efficiency. To avoid this, clean the fan regularly—especially if you cook frequently or use a lot of oil. Use suitable degreasing solutions or mild cleaning agents to remove buildup effectively, and ensure all parts are wiped clean and dry before reassembly. Regular maintenance not only improves performance but also extends the lifespan of the exhaust fan.
Maintenance Tips for Longer Fan Life
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Regular cleaning schedule:
Regular cleaning schedule is essential to keep your kitchen exhaust fan functioning efficiently and hygienically. For optimal performance, light cleaning such as wiping the exterior and filters should be done every 2–4 weeks, while a more thorough deep cleaning of blades and internal components can be carried out every 2–3 months.
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Lubrication and Motor Care:
Lubrication and motor care are important for maintaining the smooth and efficient operation of your kitchen exhaust fan. Over time, the motor and moving parts may experience wear due to continuous use and grease exposure. Periodically check the motor (if accessible and serviceable) and apply a few drops of suitable lubricating oil to the bearings to reduce friction and noise. Ensure the motor area is kept clean and free from dust and grease buildup.
Proper Usage Tips
- Always switch on the exhaust fan while cooking and let it run for a few minutes afterward to clear residual smoke and odours
- Avoid excessive grease and smoke buildup by maintaining proper ventilation and using lids while cooking
- Do not operate the fan in extremely damp or wet conditions
- Ensure the fan is installed at the recommended height for optimal airflow
- Regularly check for unusual noise or reduced performance and address issues promptly
- Use the fan consistently to maintain better air quality and prolong its lifespan
Frequently Asked Questions (FAQs) :
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Q1. Can I clean the kitchen exhaust fan on my own?
Yes, just follow the steps in the article. It can be easily done at home. If there is a need to inspect the fan for its performance, you may consider calling a skilled technician.
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Q2. When do I need to call a technician?
If the fan speed is very slow or if the fan makes a lot of noise, it’s possible that the fan needs a deeper inspection. If the parts inside the fan are damaged, these may need to be repaired.
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Q3. How often should I clean my kitchen exhaust fan?
As a best practice, you can clean your exhaust fan every 6 months. If the fan is used in a professional kitchen, and runs more frequently, this can be increased to 3 months. If you do not use the fan every often, then you can also push this to a year.
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Q4. Can I also clean the bathroom exhaust fan with the same steps?
Yes, the bathroom exhaust fan cleaning also follows similar steps. You will typically find less grime on a bathroom exhaust fan. Please remember that the bathroom exhaust fans have a lot of moisture to deal with, so avoid any further impact by using detergent sparingly. It’s important to keep the parts dry before turning it on again. Also, greasing and oiling of the fan parts will go a long way to keep the fan well running.
