Question about Whirlpool MH7140XF Microwave Oven

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Microwave Buzzing When Not in Use

Ongoing problem with my 1 year old Whirlpool microwave.

When I cook on the stove (below microwave) and produce steam, the microwave will begin to buzz LOUDLY! without even being turned on. This buzzing has gone on for hours (we have resorted to unplugging it). We had a repair guy come out to look at it but since it took 2 weeks to get an appointment, the microwave had stopped behaving this way and he couldn't reproduce the problem (mostly b/c he wouldn't listen to me when I said how the problem manifests itself). It was fine for about a month and now it's buzzing again.
Any thoughts?

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  • Megc74 May 23, 2008

    The microwave is plugged into a surge protector that is plugged into the outlet. The plug is three pronged and the surge protector has a light on that says it's grounded. The first time the loud buzzing/humming noise happened we had a some things on the stove generating a lot of steam, and we did not have the vent on. It buzzed on and off for days before resolving itself. A few days ago the same thing happened, a lot of steam hit the microwave without the vent on. I don't think this has to do with the plug, I think it has to do with some malfunctioning part within the microwave itself.

  • Anonymous Jul 29, 2008

    I have the exact same problem...looking for a solution.

  • Rettabug Dec 14, 2008

    My 4 yr. old Whirlpool Microwave is doing the same thing! If I cook a steaming pot of something below it, it starts clicking & once it even started on its own!! SCARY! I've had to resort to unplugging it from the grounded 3-prong outlet to get it to quit making the noise.

    I'm guessing that the moisture is causing something in the finger touch panel to make contact.
    This has happened twice now & I'm calling a Whirlpool rep tomorrow!


  • superman305 Apr 05, 2009

    Everytime I boil water or cook something that produces steam on the electric stove below my microwave, the microwave starts buzzing. The buzzing doesn't stop until after I'm finished cooking. What is causing the buzzing and does it need to be fixed?

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  • 525 Answers

Are you using a 3 pronged outlet and is it grounded? If you have a 2 holed outlet and are using a ground eliminator adapter, try turning the plug around to reverse the polarity. If this helps, then it would be advisable to have an electrician to ground your oven.

Posted on May 23, 2008

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