Freezer making a knocking noise is usually caused by the compressor. The compressor is what makes the cold air flow into the freezer. It is a small motor that works hard to keep your food frozen. If the motor gets too hot, it will start to make a knocking noise. This could be due to a dirty air filter or a problem with how it’s mounted on the wall of your freezer.

Checking your air filter

If you have a side-by-side refrigerator, this may be an easy fix. Check your manual to see where it says to change your air filter and how often you should do so (usually every 6 months). If you don’t know where it is located, check behind the kick plate at the bottom of the door. There should be an access panel there that you can open up to get inside and see where the filter is located. You may even be able to buy replacement filters online if yours has been damaged or lost its effectiveness over time.

Checking for any issues with mounting hardware

If you still hear a loud knocking sound coming from inside your freezer, then there may be something wrong with how it’s mounted on the wall or floor of your kitchen space or garage area where it was installed.

Last modified: September 20, 2022