Question about Whirlpool Microwave Ovens

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Hi. I have a 1996 Built-in Whirlpool Microwave (#MH7115XBB-5) Once I set a time and power setting, this built-in microwave will start. After one (1) second there are sparking sounds and then a real strong electrical burning smell. I do not believe there is any 'arching'. I have replaced the thermal fuse over a year ago. Let me know if you need more details. Thanks, Rick

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  • Sparty899 Oct 24, 2008

    I will try that, but can you direct me towards the waveguide cover?



    Thanks

  • Sparty899 Oct 24, 2008

    Thanks. I will do those things this weekend.

  • William Miller
    William Miller May 11, 2010

    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.

    Did you check that?

    You can usually find helpful exploded view diagrams here.

    Whirlpool customer service is here and you can also enter your model number on that page to download your owner's manual, installation instructions, etc.

    Let us know what you find out, and if it seems like you have electrical problems, we can take it from there.

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  • Whirlpool Master
  • 8,820 Answers

You can usually find helpful exploded view diagrams here.

Thewaveguide cover (also called a spatter shield) is usually about thesize of a playing card and often held in place by a plastic rivet.

In some models it is a larger stirrer cover type made of thicker plastic in the ceiling of the oven.

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.


Posted on Oct 24, 2008

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