Question about Microwave Ovens

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Keypad on microwave wont work

My Whirlpool Microwave MH7100XYB0 suddenly stopped working.  The light in  the interior works, but the keys don't.  The word FAIL shows on the panel.  Nothing I press seems to work.  The clock and timer wont come back on.  I tried to unplug it and plug it back in and the word FAIL reappears.

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  • Nancydog Dec 28, 2007

    keypad on over the range microwave (Maytag) has been intermittent, but now no keys work.  I thought it might be the door latch involved, but that's not it.

    Thanks for any advice.

  • Anonymous Mar 13, 2014

    Light comes on but display panel only shows 88:88
    Cannot set clock, timer, etc. Does not work at all



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The microwave oven may be provided with a self diagnostic routine that can be operated

through the touch pad keyboard. To enter the self-diagnostic routine:

1.While pressing the CANCEL keypad:

a) Open the oven door.

b) Unplug the microwave oven for 2-seconds and plug it back in.

c) Release the CANCEL keypad and close the oven door. You will see the following display.


NOTE: The humidity sensor test results will appear on the display after 8-seconds.If the tests are successful, "OK " will be displayed. If one or more of the tests fail, "ERR " will be displayed.. 2.When a keypad is pressed, a number according to the test chart will be displayed. When no keypad is pressed, a blank "—" is displayed...



Power Failure: After a power failure, the WELCOME screen will be displayed.

F2 —Keyboard Failure: Refer to the Tech Sheet and conduct a touch panel continuity test.

F3H —Humidity Sensor Failure: Refer to the Tech Sheet and test the sensor.

F6 —Microwave Relay Failure: Check the microwave relay.

F7 —Microcomputer Board Failure: Change the microcomputer board.

Posted on Oct 18, 2007

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  • 9,098 Answers

This may have already been dealt with, but others can benefit from an accurate, thoughtful reply to this problem.

Is it possible that some spray cleaner got into the controls?

I always recommend that users instead spray cleaner on a soft cloth then wipe the control panel.

Also, I always recommend non-ammonia cleaners since ammonia can crack and damage plastic.

Otherwise, the spray can get into the controls and lock it up or make it act odd.

If it does not dry out over time, it may need to be manually dried or blown out.

The keypad may be damaged or worn out, or control unit may be damaged.

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

Please write back with more details if you need further help.

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

Posted on Nov 26, 2007


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Posted on Jan 02, 2017

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You can download a copy of the manual here:

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