Question about Viking VMOC205SS Microwave Oven

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My viking professional microwave is shooting sparks and caused a burn mark on the inside of the oven wall? Can I fix it or is it shot?

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Quite often this is due to grease or food particles stuck somewhere in the cavity of the oven or stuck on or behind the waveguide cover.

The waveguide cover (also called a spatter shield) 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 metal of the oven wall is burned or chipped, the area will first have to be sanded smooth and cleaned 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 the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.

Once that dries thoroughly, you can sand it very smooth, then apply paint.

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

It provides critical protection for the magnetron.

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

Posted on May 28, 2010

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see this indication and fix it. God bless you
  1. Waveguide coverSparking and arcing in a microwave can be caused by a damaged waveguide cover. Try removing the waveguide cover to see if the problem persists. Once removed, the waveguide cover can be inspected for burns, which will indicate if this is the issue. If the waveguide cover is burnt or will not stay in the proper spot it will need to be replaced.
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My Viking microwave is sparking from the right side when turned on. I removed and cleaned the guide cover as I read about on your site and it still sparks. Is there anything I can do to fix this? All of...


Quite often this is due to grease or food particles stuck somewhere in the cavity of the oven or stuck on or in the waveguide behind the waveguide cover.

The cover and the metal behind it should be cleaned with a mild,
non-ammonia cleaner.


Otherwise, there may be grease or food particles deeper in the waveguide or even on the magnetron itself.


If the metal of the oven wall is burned or chipped, the area will first have to be sanded smooth and cleaned 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 the cavity metal of the oven is cracked or split, you can use a small amount of steel-based epoxy such as JB-WELD to patch the crack or hole.

Once that dries thoroughly, you can sand it very smooth, then apply paint.

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

It provides critical protection for the magnetron.

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

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