Question about Maytag MMC5000 Microwave Oven

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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 the magnatron going out. It doesn't smell when it arcs and no fuses are popped.

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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.

Posted on Apr 17, 2014

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Hi, Vern
I'm a little late in seeing your problem so you may have solved it already. But in the absence of metal objects inside the oven, any arcing is cause for you to not use the appliance until a solution is found. Cleaning - of course. Replacing the magnetron - perhaps. Damage to the wave-guide - quite unlikely.

Posted on May 05, 2014

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Posted on Jan 02, 2017

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SOURCE: 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.

Posted on May 08, 2012

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1 Answer

Why does my microwave arch at the wave guard


Typically most arcing in a microwave is caused by food splatter. A microwave cannot tell the difference between what is on a plate or on the wall or ceiling. Every food particle in a microwave will continue to cook until it turns to carbon and will attract the microwave energy and focus it to that spot and the unit will arc. Thorough cleaning of the entire microwave cooking cavity and removal of any burn or soot mark will commonly stop the arcing. If your microwave has a painted cavity, you can even use some very fine sand paper to remove any burn mark. Always cover what you are warming and really keep the inside of the microwave clean. If your wave guide cover is made out of the Mica board, and If it has gotten wet from cleaning or from splatter, it must be replaced. You can either order a new one or order a sheet of the mica board and cut out a new one yourself. If the microwave is arcing in the waveguide, generally the unit will need to be replaced. One quick test to see if the unit will work is to remove the bad cover and place a small container of water in the unit, run the machine of a minute or so and see if it still arcs. If it does, the arcing is in the waveguide area, if not it may have just been a problem with the cover. You can run the unit without the waveguide cover in place, it is only there to prevent splatter from getting into the waveguide, so removing it to test the unit is ok. If the area inside the wave guide shows signs of soot and arcing. You can try to wipe that out with some alcohol or lacquer thinner and then try it again. Good Luck.

May 15, 2014 | Magic Chef 1.6 Cu Ft Countertop Microwave...

1 Answer

Arcing from the metal plate on the right side of the oven when anything solid is place in it - such as frozen foods or a cold stick of oleo or frozen biscuit. Goes off when I open the door.


That metal plate is probably the waveguide cover. It is made of Mica and must be kept clean otherwise it will arc and burn. The reason it arcs more when solid/frozen food are placed in the oven is because solid/frozen foods do not absorb as much energy as wet foods.
Replace it if it is burnt.

Dec 20, 2010 | GE Microwave Ovens

1 Answer

I have a GE Microwave Oven/Dual Element Browner Model # JES1288SHO3. The inside cabinet is arching through the wave guide panel. DAVE IN LA.


Hi Dave in LA,

The wave gude cover is replaceable, the part number is1085082. The reason for arcing through is typically a splatter of food stuck to the cover and then the heating waves overcooked or burned it. Carefully replace the cover (panel), look for any burned spots behind the cover, if the wave guide is burned through, the Microwave is unrepairable. If the waveguide has small arc spots you can carefully clean (sandpaper) and use touchup paint to recoat. I hope this helps and if it does, please let us know!

Apr 18, 2010 | Microwave Ovens

1 Answer

My microwave just started to arc. Is the waveguide cover the metal piece inside the oven? Should I try to remove it to clean both sides with steel wool?


No the wave guide is usually a porous material that almost looks like a light colored cardboard piece. Sound as if the stirrer plate is waht you are seeing. Make sure M/W is clean inside completly. Any build up of grease can cause this. Also make sure to check for chipped areas and if there are use an appliance touch up to cover the bare metal areas. A good cleaning will usually take care of the arcing tho.

Feb 07, 2010 | Microwave Ovens

2 Answers

Sparks and strange noise when microwave is turned on even when empty inside. i have a ge jvm1850smss over the oven microwave.


YOU SHOULD NOT RUN MICRO WITHOUT ANY THING IN IT / THIS WILL OVER LOAD THE MAG TUBE . AND SOME TIMES FRY IT .. The sparking and arcing is probably a bad wave guide . this is sometimes caused by food splater / it gets in the cracks and corners and then cooks till it truns to carbon which conduts the micro's and thus arching .. clean it good and touch up any burns in the metal and repl wave guide cover. mm hope this will help .. mm

Dec 20, 2009 | GE Spacemaker Over-the-Range Microwave

1 Answer

Have a GE JVM1650AB002. Yesterday my mother started the microwave with nothing in it to cook for 1 minute and it sparked & arced on the metal shelf & the left side wall melting some plastic. 1. Is...


The plastic is a wave guide cover. It will need replaced to keep splatter from getting in there. The arcing has left carbon deposits that must be cleaned and any bare metal repainted with microwave paint. It might be fixable but that depends on the extent of the damage. Eric

Sep 17, 2009 | Microwave Ovens

3 Answers

Arcing inside and there is now a small hole on the panel side. Is this fixable?


Hi,

It looks like there's lightning (arcing) inside my microwave When you see arcing inside your microwave, it's because of food or liquid left in the cavity or on the wave-guide cover:

  • If the wave guide has any burn spots, replace it and clean the unit well.

  • If the cavity has any burn spots, spot-sand it smooth and touch it up with microwave interior paint.

Note… If there are any burn holes in the cavity, don't use the unit-seek help from a qualified appliance repair technician.

Thanks for contacting Fixya

Jun 20, 2009 | Microwave Ovens

1 Answer

My high power GE Advantium microwave is sparking


Your problem is a common one. When you see arcing inside your microwave, it's because of food or liquid left in the cavity or on the wave-guide cover:

  • If the wave guide has any burn spots, replace it and clean the unit well.

  • If the cavity has any burn spots, spot-sand it smooth and touch it up with microwave interior paint.
Note… If there are any burn holes in the cavity, don't use the unit-seek help from a qualified appliance repair technician.

May 28, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Clicking When Unit Starts


Q - When there is small amounts of food in the oven, arcing occurs right behind the plate where the wave guide comes into the oven. Sometimes it works well and sometimes you can't even put in a bag of popcorn. Any ideas? Could food have 'dripped' in here and be causing a microwave short?
 
A - Yes! Food splatter or drips can continue to cook and will carbon over creating sparks/arcs from the wave guide cover. Usually can clean up the food on and under the wave guide cover, if the oven liner has been damaged we usually lightly sand and touch up those marks with touch paint. Do not let it go for too long as damage to the magnetron end is possible as well :(   If the wave guide cover has been damaged, replace it!

Apr 01, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

GE Microwave is arcing inside


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 the plastic ceiling.

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.

If you need more specific help, please reply back with your brand and full model number.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Nov 13, 2008 | GE JES1384SF Microwave Oven

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