Question about Sharp Microwave Ovens
Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the waveguide cover.
The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.
It can be fragile, and the metal edges of the oven behind it can be sharp, so be careful!
The cover and the metal behind it should be cleaned with a mild, non-ammonia cleaner.
If the cavity metal of the oven is chipped or charred, it will have to be sanded smooth and clean and dried thoroughly.
Then you can apply some high-temperature appliance paint, available from places like Wal-Mart, Lowe's or Builder's Square.
If your waveguide cover is burned, it will need to be replaced. It provides important protection for the magnetron.
We have the service manuals for this model and have uploaded them to our site here and here to help you. You will need the free Adobe Reader to view or print them.
The best place to order Sharp parts is Tritronics.
Please write back if you need further help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Aug 12, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
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