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GE MICROWAVE JVM 2070 WILL NOT HEAT

4 year old GE Spacemaker 2 Microwave (JVM 2070). Mircowave comes on, makes sound like it is heating, but does not heat food. Panel, lights, vent work fine.

Tried unplugging, still same problem.

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  • 3 more comments 
  • coabbott Dec 26, 2008

    I have the same problem with the JVM2070 - it is stuck in demo mode - PLEASE HELP

  • powellrb Dec 28, 2008

    In response to clarification request:

    When I hit Start to cook, inside light and turntable come on.

    It is a little louder than usual when in the cook mode.

  • powellrb Dec 28, 2008

    Light and turntable come on when I hit Start.



    Noise is a little louder than usual when in the cook mode.

  • hudsonut Jan 11, 2009

    I have a JVM2070 stuck in "Demo" mode also. Looks like something they use in stores to show the unit. Anyone know they "magic" procedure to change this back to operational mode?

  • William Miller
    William Miller May 11, 2010

    When you hit Start to
    cook, do the inside light and turntable come on?




    Any unusual noises? Is
    it louder or quieter than usual?




    These answers will help
    me judge whether it's in the high voltage
    section (magnetron, transformer, or diode) or the control section
    (door switch or control board relay or connection).




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1 Answer

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  • Microwave Ovens Master
  • 8,820 Answers

With the symptoms you have, I would most strongly suspect a shorted high voltage rectifier diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.

There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

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

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

Some manufacturers will send you the magnetron to do it yourself. If nothing else, you can save about $75 by taking it to the shop yourself.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

You can download GE owner's manuals and installation instructions and find your nearest authorized servicer here.

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

Posted on Dec 28, 2008

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