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Posted on Aug 12, 2007
Answered by a Fixya Expert

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Microwave runs but does not heat.

My microwave has stopped heating yet still runs. Now this happened the same day and time my rifridgerator quit!! In my town we have had a few power outages, one lasting 30 mins, but this problem did not occur until two days after the outage. Is this a fixable problem or should the microwave be tossed. It is dated August of 2001 so it is 6 years old.

  • John Gachago Oct 05, 2008

    My microwave runs but it doesnt heat. Just happned this afternoon. Help ! BTW there's a smell like something burning inside it when it runs, like wiring/plastic..Its a GE microwave oven model # JVM166OSB004.

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William Miller

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  • Emerson Master 9,179 Answers
  • Posted on Oct 22, 2007
William Miller
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Joined: Sep 15, 2006
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Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose conneciton on the control unit circuit board
- bad magnetron or other high voltage part

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and

disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

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

For more help from Emerson http://www.emersonradio.com ; Get help using your appliance 1-800-898-9020 ; Get help locating a servicer or parts 1-800-695-0098.

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This louder, 60 cycle hum is usually caused by a bad magnetron. The unit will not heat when this happens. Repair cost can exceed $100.
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Microwave doesnot heat anything

6 years is a good run for a microwave to keep working
as it is basically a high frequency radio transmitter, take it in for a proper diagnosis and a quote
mostly after 6 years there may be a shortage of parts available for repair so keep in mind that it may be cheaper to junk it and get a later model
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The microwave stopped heating. Everything else is working fine.

Ok, concerning the heating issue. you will need to replace the Magnetron to restore the heating feature in this unit. this device is damaged.

Concerning the motor(circulation). If the motor is not working, this will damaged the Magnetron, due to poor circulation. i recommend replacing the motor asap.

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Yeah, it's time to invest in a new oven. The magnetron tube in yours most likely just finally wore out. It's the source of the microwaves, and like any tube it gets weaker with age and finally just quits altogether. It would cost more for a new magnetron than it would for a new oven these days.
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I had same problem last week. My GE JVM1650 Spacemaker stopped after a few seconds of heating. Owned 16 months, manufactured Jan 2005. It was the magnetron, which was replaced yesterday. The magnetron has a 10-year warranty, but I had to pay $161.00 for labor by a GE technician. The call-out fee was waived at my request. I don't know what that amount would have been, but I can't believe the $161.00 for what was about 1/2 hour labor once diagnosed. Good Luck!
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