Question about Microwave Ovens

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My mother's GE microwave oven has a large burn mark on the ceiling of the unit. She noticed some plastic parts on the floor of the unit. She bought the combination microwave-stove about four years ago and noticed this mark about ten days ago and has stopped using the microwave..... Her problem is that the thing is attached to the oven and she is afraid that she'll have to replace the entire unit...any suggestions?

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That would be the stirrer assembly. It consists of the stirrer motor, stirrer blade, and stirrer cover.

Without the stirrer in place, the oven will not cook evenly and may arc and spark.

Without the cover in place, food particles and grease can get on the waveguide and magnetron, and cause arcing damage.

You can find helpful exploded view diagrams and order parts by entering your full model number here.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

If you need to replace the stirrer motor, you'll probably have to pull the oven from the wall. You can download GE owner's manuals and installation instructions here.

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.

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

Posted on Dec 08, 2008

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Quite often this is due to grease or food particles stuck to the inside of the oven or stuck on or behind the mica waveguide cover.

The waveguide cover is usually about the size of a playing card and often held in place by a plastic rivet.

Sometimes it is the ceiling of the oven.

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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.

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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.

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If your waveguide cover is burned, it will need to be replaced.

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Otherwise, it may be a problem with the high voltage transformer or magnetron. It would have to be checked.

 

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