Question about Magic Chef Microwave Ovens

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Microwave Oven Model MCD 1311ST, Serial No. 20535796, purchased 9/21/2002 from Costsco Prtoblem -grumbling sound, overheating and flickering lights inside unit whem turned on. Problem not caused by using metal containers or dishes with metal trim. Is there an easy solution to the problem or is it time to purchase a new unit? I suspect a service call would be more than the original cost of the unit. Thanks for your assistance. Nat Giacobbi Please note new email address: NJGiacobbi@MSN.com

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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.

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

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.

The overheating concerns me. I would suspect that your turntable may not be working, or if so equipped, the stirrer may be stuck.

Or overheating is often a sign of a magnetron that's ready to fail.

I would look for the waveguide cover, clean it as needed as noted above, and look for any signs of charring.

Once you know it's clean, i would stay close when using it. If it works, then it may be okay. If it continues to arc or overheat, i would say the magnetron is dying.

Please write back if you need further help.

For more help from Magic Chef / Ewave see here or their contact page or order parts here.

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

Posted on Sep 27, 2008

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