How to Unclog a Blocked Rangehood Filter
A clogged rangehood filter is one of the most common reasons a rangehood loses suction or starts making unusual noises. Grease builds up in the filter over time, restricting airflow and reducing its effectiveness. Here's how to clean and unclog your rangehood filter properly.
How Often Should You Clean the Filter?
As a general guide, clean your rangehood filter every 1–3 months if you cook regularly. If you do a lot of high-heat cooking (stir-frying, frying, grilling), clean it monthly. Most modern rangehoods have an indicator light that alerts you when the filter needs cleaning.
Aluminium Mesh Filters
Aluminium mesh filters are the most common type. Here's how to clean them:
- Turn off the rangehood and allow any residual heat to dissipate
- Remove the filter — most slide or clip out easily
- Soak the filter in a sink of hot water with 2–3 tablespoons of dish soap and a cup of baking soda for 10–20 minutes. This loosens the grease.
- Scrub with a stiff brush or old toothbrush. Work along the mesh, not across it, to avoid distorting the mesh.
- Rinse thoroughly under hot water
- Allow to air-dry completely before reinstalling
Aluminium mesh filters can also be run through the dishwasher on a hot cycle (top rack). Check your rangehood manual first.
Stainless Steel Baffle Filters
Baffle filters are easier to clean and more durable. Remove them from the rangehood and wash in hot soapy water or run them through the dishwasher. Stubborn grease can be removed with a degreaser spray.
Charcoal Filters (Recirculating Rangehoods)
Charcoal (carbon) filters are used in recirculating rangehoods to absorb odours. They cannot be cleaned — they must be replaced when clogged, typically every 3–6 months. Check your rangehood model for the correct replacement filter.
When Cleaning Isn't Enough
If the filter is deformed, torn or the mesh is distorted, it needs replacing rather than cleaning. Replacement filters for most brands are available through us at Oceania Appliances or directly from the manufacturer.
Improving Rangehood Performance
If your rangehood isn't extracting effectively even after cleaning the filter, check that the ducting isn't blocked or kinked. For rangehoods over 5–7 years old with declining performance, it may be time to upgrade. Browse our rangehood range online or in our Wetherill Park showroom.