Question about Microwave Ovens
> silver card thing
This is the waveguide cover and it provides important protection for the magnetron.
The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.
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.
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.
If your waveguide cover is burned, it will need to be replaced.
We're happy to help and we appreciate your thoughtful rating of our answer.
Posted on Jul 11, 2008
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Posted on Jan 02, 2017
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