Question about Microwave Ovens

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Interior cardboard/foil piece fell off revealing small chamber inside oven--still safe?

I'm replacing a westinghouse 3504 microwave oven BUT...the new one isn't here yet. inside the oven/cooking chamber is a small, rectangular recess that WAS previously covered by a foil coated cardboard panel, which has now fallen off. what is this small recess? is the oven safe to use until my new one arrives? can i/should i improvise a covering for this recess, and if so with what material?

Thanks from single dad, father of 2, from all of us.

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  • deesea1 Oct 24, 2008

    microwave Svc, you are indeed a guru, and i thank you. i wish you the best of success and health, for you and your family. our new LG ($90) from best buy, free delivery, will be here today.

    in the last few years, i've junked out 2 mercedes, several computers and monitors, and a Mr. Coffee, too. people, values, things--everything's becoming disposable in America.

    be well, and thank you!

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  • Microwave Ovens Master
  • 9,098 Answers

This is the mica or plastic waveguide cover. It protects the waveguide and magnetron form grease and food particles.

Assuming you're going to scrap the unit, carefully clean the area around the outside of opening (watch for sharp edges) with a lightly damp soft cloth.

Then use alcohol or a hair dryer, etc. to be sure the area is dry.

Then you can use a couple of strips of clear packing tape to cover the opening and trim it with a razor blade so only about 1/4" or so extends out from the opening.

Note that I only recommend this procedure on an oven that is going to be scrapped. If the oven will see continued use, a new waveguide cover should be purchased.

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

Posted on Oct 24, 2008

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