Question about Whirlpool MT8118XE Microwave Oven

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Whirlpool Microwave Model# MH1140XMQ-1

Runs but begins making a loud noise and you can smell something burning. Have not tried to use.

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  • drickel01 Nov 23, 2008

    Actually, the problem seems to be coming from the white cover plate, with a scre in it, on the inside top - when you first turn the unit on it runs fine - after about 10 seconds the vibrating noise starts and sparks, or a charge, visibly comes across the coverplate. We shut it off at the point so do not know what would happen next.

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  • Whirlpool Master
  • 8,820 Answers

Quite often this is due to grease or food particles stuck somewhere in the cavity of the oven or stuck on or behind the waveguide cover, what you mentioned as the white cover plate.

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.

You can order parts by entering your full model number here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Nov 24, 2008

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