Question about Magic Chef MCD1311ST Microwave Oven

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Mcd1311st 1100 smoking and arching

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  • bdoug Sep 09, 2008

    I have the MCD1311ST and it arcs behind the waveguide cover if the item in the oven is small. Placing a cup of water in the oven with the item usually stops the arcing, but my confidence in the unit safety is LOW. I am cleaning the cover and waveguide area as recommended. This unit is 4 years old and other than this recent arcing problem, I have been very happy with it.

  • bdoug Sep 21, 2008

    Follow-up - I examined the original waveguide cover and found a possible spot of something (maybe grease) on the inside where the arcing was occurring. The cover was slightly damaged at that location. After several calls, I finally got a number for the manufacturer, Daewoo, (877-393-7823) in NJ and they were very helpful. I purchased a new waveguide cover for $2.52 (unfortunately the shipping was $8.00), but still a lot less than buying a new oven! The arcing problem appears to be solved, but I still watch the unit carefully.

  • ksaad Nov 07, 2008

    WOW - I am so glad I found this website! Our microwave is having the same problem, and I can see that the waveguide cover is damaged, and there is a dusting of metal particles inside. I have now ordered a new waveguide cover, and will clean the microwave thoroughly, and hopefully that will solve the problem! I'll keep you posted.

  • Anonymous Jan 16, 2009


  • Anonymous Mar 31, 2014




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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.

(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.

You can order Magic Chef / Ewave parts here.

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

Posted on Aug 03, 2008

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Man that was right on the money fixed asap washed it dried it bam saved me from going out to buy a new one even suprised the wife hahahahahaa thank you all for the great advice

Posted on May 19, 2009


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