(I'm thinking that's model number MW8115SS?)
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.
Thewaveguide cover (also called a spatter shield) is usually about thesize 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.
For more help from Emerson
visit here or get help using your appliance at 1-800-898-9020. Get help locating a servicer or parts at 1-800-695-0098.
Emerson parts are distributed by
Fox International and their number is 800-321-6993. Or you might try e-mailing
[email protected]Many Emerson microwave owner's manuals are available for free download
here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
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