I Just Learned My Microwave Is Years Overdue for a Filter Change

When was the last time you cleaned your microwave filters? Be honest. Did you even know this appliance had filters to clean or replace to begin with?

Most over-the-range microwaves have a grease filter, as well as a charcoal filter that helps reduce odors. These parts need your attention for the appliance to run at top efficiency on a regular basis. If you're like me, you have had your appliance for a year or more and have never removed these for cleaning or checked for replacement.

As it turns out, the grease filter needs to be cleaned and the charcoal filter changed every six months. Well, now we know!

Homeowners on TikTok and Instagram have created viral videos to show how they have been cleaning their microwave filters. The comments section reveals there are a lot of us using our trusty microwaves and not cleaning filters (or even knowing that they were there). 

Types of Microwave Filters

There are two types of microwave filters: grease filters and charcoal filters. Most microwaves have both and they work together to keep the appliance working efficiently but each filter has a different function.

Not sure what kind of filter or filters your microwave has in place? Check the user manual. The placement varies by brand and model and may be on the back wall or above or below the cooking surface of the appliance.

According to Samsung, “Countertop microwaves don't have to worry about filters, but over-the-range microwaves use at least one type of filter.”

What Do the Microwave Filters Do?

The Grease Filter

A grease filter helps keep grease and other dust and debris from entering the vent system of your microwave. The exhaust fan works to circulate clean air into your kitchen as you cook at your range below. If the grease filter becomes dirty, the function of the exhaust fan won't be able to properly clean the air.

The Charcoal Filter

Charcoal filters work to recirculate the air in the venting systems. Their purpose is to mainly absorb odors in the kitchen.

Do You Need to Replace Your Microwave Filters?

Filters play a key role in the microwave’s performance. Proper maintenance helps the trusty appliance work to capacity and avoid strong odors in the kitchen.

The microwave’s grease filter should be cleaned once a month unless there is physical damage to the part. If the grease filter becomes damaged or broken, be sure to replace it as soon as possible to avoid residual grease from entering the vent system of your microwave and to keep it running properly.

The charcoal filter on a microwave needs to be replaced. Unlike the grease filter, the charcoal filter cannot be cleaned. Plan to replace it about every 6 months.

According to Maytag, “Microwave charcoal filters should be replaced at the very least every six months. However, if you cook frequently, check your filter every three months or so to see the level of soil it has and replace it if necessary. Alternatively, if you don’t cook too often, then you may be able to hold out on replacing your filter every seven to eight months”

How to Clean and Replace Microwave  Filters

How to Clean Grease Filters: 

The experts at Samsung note that you should check to see if there are one or two grease filters. “Grease filters are on the bottom of the microwave. There might be one or two of these and they should be cleaned regularly.”

Turn off the microwave and remove the filter. This is located under the appliance and should easily pop out. Soak the grease filter in warm, soapy water for 10 to 15 minutes. You can gently scrub with a soft sponge or dish brush. Rinse and allow to dry completely before replacing in the microwave. 

How to Replace Charcoal Filters:

Turn off the microwave. A screwdriver will help to remove the vent panel. Remove the old charcoal filter and replace with a new one. Replacement microwave filters can be purchased at a home improvement store or on your appliance’s manufacturer's website.