How to Fix a Broken Kitchen Exhaust Hood Filter: Step-by-Step Guide

Frequently Asked Questions

How often should I clean my range hood grease filter?

For average cooking use, clean grease filters every one to three months. If you cook frequently or fry foods often, monthly cleaning is recommended to maintain airflow and prevent fire hazards.

Can I put range hood filters in the dishwasher?

Most aluminum mesh grease filters are dishwasher-safe. Place them on the bottom rack and run a hot cycle with a degreaser detergent. Avoid the dishwasher if the filter has a charcoal layer, as it will be destroyed.

How do I know if my range hood filter needs replacing instead of cleaning?

If the mesh is bent, torn, or corroded, or if it remains visibly greasy after multiple cleanings, replace it. A filter that cannot be restored to normal airflow is a fire risk.

What size replacement filter do I need?

Measure the length and width of your existing filter in inches. Most replacement filters come in standard sizes like 6x8, 7x19, or 8x14. Write down your model number and check the manufacturer site or Amazon for an exact match.

Why is my range hood not pulling smoke even after cleaning the filter?

A clean filter alone may not fix weak suction. Check the fan motor, inspect the ductwork for blockages or disconnected sections, and verify the exterior vent damper opens freely when the fan is running.

Are charcoal filters and grease filters the same thing?

No. Grease filters are metal mesh that captures grease particles and are found in all range hoods. Charcoal filters are used only in recirculating (ductless) hoods to absorb odors. They require separate replacement and cannot be cleaned.

Cleaning or replacing a range hood grease filter: (1) Grease filters should be cleaned monthly (every 2 weeks in households that cook frequently). A clogged grease filter drastically reduces hood suction and is a fire hazard.

A poorly performing range hood is one of the most overlooked kitchen problems. Grease-clogged filters reduce airflow, increase fire risk, and leave cooking odors lingering in your home. Whether your filter is saturated with grease, bent out of shape, or simply past its useful life, restoring your hood to full performance is a straightforward repair.

Identifying the Problem

Start by removing the filter and holding it up to a light source. Healthy aluminum mesh lets light pass through evenly. A filter that blocks light or shows visible grease pooling on the mesh needs immediate attention. Look also for warped mesh frames, corrosion, or torn sections that would allow unfiltered air to bypass the media.

What You Will Need

• Dish soap or heavy-duty degreaser
• Baking soda
• Large basin or sink for soaking
• Soft brush or old toothbrush
• Replacement filter if needed (match your range hood brand and size)
• Range hood grease filter replacement
• Heavy-duty kitchen degreaser spray

Step 1: Remove the Filter

Most range hood filters slide out or pop down with a simple latch. Look for a tab or small handle on the filter frame. Pull it down and toward you. Some hoods require a slight push before the latch releases. If the filter has not been removed in a long time, grease may have hardened at the edges — run a butter knife along the perimeter to break the seal.

Step 2: Soak in a Degreasing Solution

Fill a large basin or your kitchen sink with very hot water. Add a generous squirt of dish soap plus two tablespoons of baking soda per gallon of water. Submerge the filter completely and let it soak for 15 to 30 minutes. For heavily clogged filters, add a splash of white vinegar to the soak.

After soaking, scrub the mesh with a soft brush, working in the direction of the mesh weave to push grease out rather than deeper in. Rinse under hot running water.

Step 3: Dishwasher Method

If the filter is aluminum mesh with no charcoal layer, you can run it through the dishwasher instead of hand-washing. Place it flat on the bottom rack and run the hottest cycle available. Use a dishwasher detergent with grease-cutting enzymes. This method works well for routine maintenance cleaning.

Step 4: Assess the Filter After Cleaning

After cleaning and drying, hold the filter up to light again. If light passes through evenly and the mesh is flat and undamaged, reinstall it. If the mesh is still visibly clogged, bent, or corroded, proceed to replacement.

Step 5: Order a Replacement Filter

Measure your existing filter: length, width, and thickness. Note whether it is a baffle-style aluminum filter or a flat mesh panel. Check your range hood model number (usually on a sticker inside the hood near the fan) to find an exact match. Universal replacement filters are widely available for standard sizes.

Shop replacement range hood filters on Amazon by entering your dimensions in the search bar. Most filters cost $10 to $35, making replacement far cheaper than a service call.

Step 6: Clean the Hood Interior While the Filter Is Out

With the filter removed, wipe down the interior of the hood with degreaser spray and paper towels. Grease accumulates on the fan blades, the duct opening, and the inner surfaces. A clean interior reduces fire risk and helps the motor run more efficiently.

Step 7: Reinstall and Test

Slide or snap the clean or replacement filter back into its channel. Turn on the range hood fan and hold a paper towel near the filter surface — it should be pulled firmly toward the mesh by suction. Test on high speed and verify the exterior vent damper opens when the fan runs. If suction is still weak after a clean filter is installed, the fan motor or ductwork may need attention.

With a clean grease filter, your range hood can capture up to 90 percent more grease particles per minute — making this simple maintenance task one of the best things you can do for your kitchen air quality and safety.

Related guides

• How to Fix a Gas Stove Igniter That Keeps Clicking — stop a clicking igniter on the stove below while you’re already cleaning the hood
• How to Fix a Broken Range Hood Fan — motor and speed switch repair when filter cleaning doesn’t restore airflow
• How to Clean an Oven — full kitchen appliance cleaning that pairs with range hood maintenance