Question about Jenn-Air JMC7000 Microwave Oven

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JennAir JMC7000ADW Microwave Oven Not Heating Well

Hi,

I have a JennAir oven/microwave combo. It is a little over 8 years old. Recently, the microwave oven (model JMC7000ADW) stopped heating well. Everything still works, it is just that the food or drink does not get hot. I did a test today with about 6 ounces of water in the JennAir. I put it on high for one minute and it was luke warm at the end of the cycle. I did the same test with another microwave that we own and it was very hot at the end of the cycle.

Any idea on what is causing this?

Posted by on

  • scottpbutler Nov 26, 2008

    Dear MicrowaveSvc,



    Thanks for the information. I will test the magnetron this weekend per the link you provided and let you know what I find.

  • cotlod Mar 11, 2009

    Everything works fine, but nothing gets hot.

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  • Jenn-Air Master
  • 8,820 Answers

Assuming the turntable is working and the power at the outlet is correct (110 to 125VAC) then you almost certainly have a failing magnetron.

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.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first: http://www.gallawa.com/microtech/mag_test.html (continuity can be good even though it is bad!)

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

There should also 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.

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

Posted on Nov 23, 2008

  • William Miller
    William Miller Nov 27, 2008

    Bear in mind that the Gallawa test I linked to will not reveal if a magnetron is weak, which I think is the case with your oven.

    I'm sure you'll find that it will pass these tests but still be bad.

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