Question about Microwave Ovens

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My approx. 6 wk old GE Microwave (Model JES1358WL01), Ser.#TM904440U began "arcing" last week for no apparent reason--it did it again this morning while I was reheating my coffee...the same cup that I"ve been using since we bought the oven. No metal or aluminum objects were ever used in it, and up till this problem started, I was very impressed with this product--however, this arcing & spark- ing problem is unacceptable. I'd appreciate some input.

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  • Anonymous Apr 28, 2008

    My oven started arcing for a short time about two weeks ago and yesterday it did it more frequently while heating a cup of coffee in a cup I have used before. I haven't done anything yet, because I didn't know what the cause was and still don't.

  • Yappydoo Apr 28, 2008

    My oven started arcing for a short time a coulple of weeks ago and yeaterday it did it more frequently while heating a cup of coffee, in a cup I have have used before. I have not done anything because I didn't know whatwas the cause . If it is metal, how do you get rid of the metal.

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  • Microwave Ovens Master
  • 8,820 Answers

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.

The small type 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.

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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

Posted on Apr 20, 2008

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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)

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My microwave cooktop lights keep burning out. why? i've changed the 10 watt low volt bulbs 4 times in the last 6 mos. each time being careful not to touch the bulbs with my fingers. they will work for...


Are you keeping them on all the time?

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Both these conditions are factors in premature bulb failure.

I would also avoid cheap Chinese bulbs from grocery stores and get the GE-specified bulbs either from here online or a local home center such as Lowe's or Home Depot. etc.

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

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You may be able to remove the back panel (after you unplug it of course) and change out the fuse if its burned.... I have read up on these microwaves and there seems to be a lot of them doing this same thing. If its not the fuse then you are probably better off buying a new one because the repair cost will be more than the microwave itself........ Your looking at a repair cost of around $312....... Depending on who does it. Just try to replace the fuse and if that doesnt work, you can have somebody look at it if would like.

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I would contact GE to get it fixed free. GE Customer Service is here.

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

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Since it's less than a year from your date of purchase, this should be fully under warranty.

The problem is most likely a bad door switch or door switch alignment, but let GE take care of it for you.

GE Customer Service is at http://www.geappliances.com/service_and_support/contact/

They can connect you with your nearest GE-authorized service center to fix it for you.

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

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It might be better to post this in the GE section, but I'll be happy to answer it here, too.

I would suspect a bad magnetron or high-voltage transformer, but it may be the turntable motor or an arcing stirrer.

If you can post back with the model number and a bit more detail on when and how it happens, we may be able to help you better.

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