Question about Whirlpool MH7140XF Microwave Oven

2 Answers

Microwave won't work

The display screen on the Microwave says "F6". Nothing we try seems to clear this from the screen. When we close the door to the microwave - the display screen still says "F6" and the microwave makes a buzzing noise. When we open the door the buzzing noise stops. None of the panel buttons work. Seems locked up. Any ideas?

Posted by Brian Staley on

  • 4 more comments 
  • Anonymous Nov 04, 2007

    Same exact problem here. Tried unplugging and re-plugging. Nope. Now I need to know how to unplug the keypad internally......

  • Anonymous Nov 07, 2007

    went to turn the microwave on it came on for a second now nothing works
    it is a emerson

  • Anonymous Mar 13, 2014

    I close door and sometimes light stays on and buzzing noise occurs. Also, not heating to full capacity sometimes

  • Anonymous Mar 27, 2014

    it makes a low noise when door is closed but a loud R-r-R-r- noise when door is open

  • Anonymous Mar 27, 2014

    microwave oven makes small noise with door closed but a loud R-R-R-R NOISE WHEN DOOR IS OPEN

  • Anonymous Mar 31, 2014

    microwave stopped working and now displays F6 on the screen

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2 Answers

William Miller

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  • Whirlpool Master
  • 9,179 Answers

F6 usually means a fault in the controller or keypad. You could try to unplug it for several minutes, then plug it back in. If it still fails, maybe you or a friend can disconnect the power cord, unplug the keypad strip internally, then plug the power cord back in and try it with the keypad still disconnected. If it does not fail again, you have a wet or shorted keypad and can dry it or order one. If it does fail again, the control board is bad. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your full model number (without the suffix) here: http://tinyurl.com/gv383 Sorry I didn't get to answer this before the bogus answer was posted. I've been tied up and away from the PC.

Posted on Apr 10, 2007

  • 1 more comment 
  • Anonymous Sep 03, 2011

    Before ordering and replacing the control board, try the "slap" method, which worked for me. Just slap the side of the microwave with your fist. Then, if a colon appears in the display, reset the clock. This often works for both Kenmore and Whirlpool microwave ovens and will save you a lot of expense and aggravation. I found this solution posted on this site.

  • kipper101260 Sep 10, 2011

    Hey.....the slap thing worked great!! You just saved me $429.00 for a new over cooktop microwave. Thanks Kipper

  • ecm30d
    ecm30d Apr 09, 2013

    Wow, incredible. the slap method is working. just try it. Thank you, nick and kipper.

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Henry Thomas

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  • Master
  • 1,074 Answers

Have a tech look at it.your problem coudl be the high voltage cap or the diode.the door switch can be checked also,good luck.

Posted on Apr 02, 2007

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F-6 showed up on my microwave window

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.
CHART
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...
F6 ?Microwave Relay Failure: Check the microwave relay.
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I replaced the light bulb, now it displays -F6- and pushing any button causes a humming noise.

I left the unit unplugged over night, plugged it back in the next day and still had the same problem.
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What does -F6- code stand for?

F6 means a problem in the control circuit board.
Try unplugging the microwave with the door open, then plug it back.
Try the solution that you find here, if it does not work the panel must be replaced.

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Kenmore microwave

i fixed by unplugging the microwave with the door open. I plugged it back in and the F6 was gone. I was then able to set the clock and turn the light on/off . When I closed the microwave door, the F6 came back on and the microwave was making a humming noise. I slapped the side of the microwave near the keypad, and the F6 cleared from the readout and the humming stopped. The microwave is working fine now. Don't know why, except maybe slap on the side reset a relay or something. Anyway, I will never by a Sears Kenmore appliance for the rest of my life. The door rattles when you open a close it (like a part inside the door is broken) and this is the second time a fault code has appeared during use. I had GE Profile appliances at my last house, which are more $$ initial cost, but who wants to screw around buying a new microwave every four or five years. I'll happily spend a couple hundred more for the peace of mind and knowing that it will work during Thanksgiving dinner with the family over.
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I have have a 10 year old Kenmore Hood/Microwave combo built by Whirpool. I'm getting an F6 error code. What is the error code trying to tell me?

F6 —Microwave Relay Failure: Check the microwave relay.

The F6 error code which is flashing on your microwave refers to a faulty relay. However, I would suggest that you first try to run a diagnostic (which you may not be able to, but it is beneficial if it works). Here is how:

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.

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.
If you want to try to fix it your self, Always remember Electricity is dangerous and should be treated with respect.
Microwaves are very dangerous, they can still shock you even unplugged!!
Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it. With the microwave unplugged.

Hope that helps.........
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Kenmore Microwave hood combo Model # 66569689992 F6 error code?

i fixed by unplugging the microwave with the door open. I plugged it back in and the F6 was gone. I was then able to set the clock and turn the light on/off . When I closed the microwave door, the F6 came back on and the microwave was making a humming noise. I slapped the side of the microwave near the keypad, and the F6 cleared from the readout and the humming stopped. The microwave is working fine now. Don't know why, except maybe slap on the side reset a relay or something. Anyway, I will never by a Sears Kenmore appliance for the rest of my life. The door rattles when you open a close it (like a part inside the door is broken) and this is the second time a fault code has appeared during use. I had GE Profile appliances at my last house, which are more $$ initial cost, but who wants to screw around buying a new microwave every four or five years. I'll happily spend a couple hundred more for the peace of mind and knowing that it will work during Thanksgiving dinner with the family over.
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Error code F6

Please post back with your your full model number. It will be three digits, then a dot, then about eight more digits.

Once we have that, we can figure out who made it for Kenmore, then look up the F6 code.

Happy to help.
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