Listen for unusual noises or a change in the noise coming from your microwave:

Listening for noises

It is normal for a microwave to produce noise during its regular operation. A change in the type of noise produced is most likely indicative of some type of maintenance that needs to be performed.

The appearance of a grinding, squealing, or scraping sound could mean you need a belt replaced or that a motor is in need of lubrication. Performing minor maintenance tasks now, such as lubricating a motor and replacing a belt, can prevent having to conduct even more costly repairs in the future.

CAUTION: Your microwave oven is capable of giving you a serious electrical shock, even when it is unplugged. We strongly suggest you seek the assistance of an appliance repair technician when conducting any microwave oven repair.