Question about GE Microwave Ovens

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The microwave is arcing and we have checked to make sure nothing metal is in or around the microwave. Food was catching on fire.

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

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

Posted on Aug 02, 2008

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2 Answers

My GE microwave is starting to arc, You can see the arcs on the plate (I believe it is the wave guide cover) on the right side interior. Burn marks are evident on teh plate. Is it the waveguide cover or...


Some units use a plastic or fiberglass cover over the wave guide where the microwaves are dumped into the oven cavity. If this cover gets coated with food/grease, or soaks up grease, it can arc, or catch fire. If unit is still operating properly otherwise, I would suggest replacing the cover. You need to inspect the wave guide, also, to make sure it is still intact, and there are no cracks in it that would allow microwave radiation to escape.

Apr 17, 2014 | Maytag MMC5000 Microwave Oven

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MAYTAG MICROWAVE OVEN ARCING FOOD ON PLATE, HEATS EXTREMLY FAST. PUT BABY FOOD (SWEET POTATOES ON A PLATE AND WITHIN 5 SECS THE FOODS BEGINGS TO ARC AND BURN


The magnetron is getting to hot and will eventually fail, especially when it is arcing, "a safety issue convern" the cause is the part mentioned above, or there is exposed metal on the inside cavity.

May 07, 2012 | Maytag 1.6 Cu. Ft. Over-the-Range...

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Turn microwave for 3sec after it start arking noise


Take warm soapy water and clean until spotless, food partical build up will cause arcing, if no change! the microwave hood is a another trouble spot, if any bare metal is showing it will arc and need to be replaced, if everything checks out the magnetron is bad and will eventually fail.

Mar 20, 2012 | Samsung SMH7178STD Microwave Oven

1 Answer

After running for around 5-10 seconds, a large "spark" can be seen arcing inside the microwave accompanied by a "shorting out" sound.


It is the magnetron that is arcing and potentially very dangerous, the magnetron is failing or there is exposed metal or to much food particle build up. I suggest unplugging the unit and have it checked out for safety reasons.

Feb 21, 2011 | Sharp Carousel R530EST Microwave Oven

1 Answer

Sparkscome from food (no metal involved) and heating VERY quickly!


Arcing in or above oven chamberThere is often a simple cause:


  • Arcing in the oven chamber with a normal load (a cup of water, for example), often just indicates that a thorough cleaning of the oven chamber is needed, particularly around and inside/above the waveguide cover. Any food that gets trapped here will eventually burn and carbonize resulting in a focal point for further arcing. Usually, the waveguide cover is designed to be removable without taking the (cabinet) cover off of the oven. However, burnt food and carbon often make this difficult so that some disassembly will be required. See the sections: "SAFETY" and "Getting inside a microwave oven".
for more information see "Arcing in or above oven chamber" section of online Microwave Repair Manual.
If the microwave is clean, please post a reply and I will look at it again (this time include a model # and/or approx manufacture date)

Oct 21, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

I have a GE Profile convection/microwave oven, Model No JVM1790 BKC01. One of the plastic clips that holds the oven rack in place caught fire. Location of clip is top front right hand corner next to the...


Most rack support problems I have seen are from food splatter or grease getting around the support and even seeping behind it. Once it starts burining it must be replaced. It is really important to keep the area around them clean and dry and free from food splatter. A Microwave cannot tell what is on a plate or on the wall or rack support, and every food particle cooks each time the unit is run, until it turns to a carbon deposit and starts to attract the microwave energy and starts to ARC to that point.
Then it burns up the part it is arcing to. Have to replace support and scrub the area and inside of the cavity perfectly clean.

Oct 25, 2017 | GE JVM1790 Convection / Microwave Oven

1 Answer

COATING ON INSIDE OF MICROWAVE HAS STARTED TO COME OFF, EXPOSING UNDERNEATH SURFACE, IS IT STILL SAFE TO USE AND EAT FOOD COOKED IN IT?


Nothing special in there. As long as the paint is not flaking into the food you are ok, Be aware that bare metal could begin to arc. There is special microwave paint available but it will not match and look bad unless you redo the entire interior.
Eric

Sep 15, 2009 | Panasonic NN-T990SA Microwave Oven

1 Answer

Arcing... can I still use the oven?


The microwave energy is not ionizing radiation, so the real risk is further arcing and possible fire.

The cavity 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.

Jun 04, 2009 | GE Profile Spacemaker Over-the-Range...

1 Answer

System Arcs and Makes Electrical buzzing sounds


If it weren't brand new, I'd suspect arcing due to grease or food particle buildup on or under the stirrer (if equipped) or waveguide cover, or the turntable area.

But since it's new, I would suspect that the stirrer or another part may have been damaged or misaligned in shipping.

Your best bet with a new one is to get it replaced.

It's hard to put a price on peace of mind.

Jan 07, 2009 | GE JES1290 Convection/Microwave Oven

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