Question about Kenmore 63792 Microwave Oven

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We have a kenmore elite 721.80839 microwave. It frequently resets itself, sometimes the display freezes and we have to unplug it to reset it. Any ideas?

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  • soft_n_smoov May 25, 2009

    My Kenmore Elite's display just goes completely blank. I also must unplug it to reset

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You have a electrical fault in ur motherboard display....get a service done

Posted on Apr 19, 2009

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The display screen on my Kenmore Elite Microwave model #721.80802400 has frozen on 13 seconds! does not respond to turning or pushing dial. Only works by pushing manual. No idea about cook times. Is this...


The first thing I would suggest is a hard reset. Unplug the unit for a minute or so. Then plug it back in, set the clock and try again.

If that doesn't work, leave it unplugged for about 5 minutes.

If it still doesn't work, it may be a controller issue which can be repaired.

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

Feb 25, 2011 | Kenmore 80809 Microwave Oven

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What does the F9 display mean for a Kenmore Elite Microwave Model 72163769300?


The F9 error code indicates a failed inverter. If resetting the unit does not help you will need to have the inverter & harness checked.


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This can sometimes by caused by a power surge or glitch through the electrical lines.
You can sometimes clear this fault by completely unplugging the microwave for 1 minute.
Plug it back in and see if the fault code returns.
If it does, then you have an internal component failure that will need to be serviced by a technician.
Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances.
Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged.
A microwave radiation leakage test must be performed on the unit following any internal component repair.

It does not ALWAYS indicate a inverter control board problem however in other brands/models.
LG's service manual (for an example) suggests the f-9 code could be due to line voltage, magnetron, inverter module, "Relay2", or a loose connection between door/magnetron/control pcb.
Other indications might help narrow down these choices before having to pull out your multimeter and crack open the microwave case.
For example, if the microwave works, but heats slowly, then the troubleshooting manual narrows your choices down to magnetron or line voltage problems, and pretty much rules out the other possibilities.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.

May 15, 2010 | Kenmore 63792 Microwave Oven

1 Answer

Microwave will not start


We ended up taking the microwave out of the built in cabinet and, unplugging it and plugging it in again just to see if it would reset itself and that worked- at least for now!

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Kenmore Elite microwave Combi funtion not working


Unplug the unit for 1 minute to clear the ECU.
re-plug, and re-try.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question

Sep 29, 2009 | Kenmore 62622 Microwave Oven

1 Answer

Kenmore built in microwave displaying "D" and wont heat.


"d" may mean demo mode. The first thing to try is a "hard reset". Unplug it from the power outlet for 10 minutes, plug it back in, set the clock, then try again.

Jun 06, 2009 | Kenmore 62622 Microwave Oven

1 Answer

UNIT POWERS OFF AND DISPLAYS "F-9"


an inverter failure. This can sometimes by caused by a power surge or glitch through the electrical lines. You can sometimes clear this fault by completely unplugging the microwave for 1 minute. Plug it back in and see if the fault code returns. If it does, then you have an internal component failure that will need to be serviced by a technician. Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair

Aug 03, 2017 | Kenmore Microwave Ovens

1 Answer

Kenmore microwave 721 Displays 66:66 and beeps


Try first unplugging power cable for ten minutes, and see if it clears the error.

Oct 24, 2008 | Kenmore 63672 Convection/Microwave Oven

1 Answer

Kenmore elite microwave is not working. code F3H apeared after trying to run "baked potato" setting. no functions operate, display screen functions normally.


I unplugged the microwave for a few inutes, and let it reset itself. found solution on another site that DID NOT CHARGE ANYTHING for people to share solutions with each other!!!!!!!!!

Aug 02, 2008 | Elite Microwave Ovens

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Kenmore elite microwave oven displays "Locked" and will not respond


My Kenmore Elite microwave (don't have the model number in front of me) also mysteriously locked its own keypad (we were sitting in an adjacent room, heard a strange beep, and got up to find the LED reading "Locked."). I pressed and held down the Stop/Clear button for ~10 seconds and it returned to normal.

Mar 01, 2008 | Kenmore 62622 Microwave Oven

1 Answer

Kenmore elite microwave


Does the digital display light up at all? Is it completely dead? Are you sure it has power? Have you tried another outlet? If the outlet is good and the unit is completely dead, the internal fuse may have blown. You can try to take the cover off (with the unit unplugged) and look for a blown fuse. Try replacing the fuse with an EXACT fuse of the same rating. Try plugging the unit back in again and see if the unit comes back on. If not, you may have a power supply issue or defective Magnetron.

Please let me know what you find and we'll go from there.

Good Luck,
- Jim

Jan 28, 2008 | Kenmore 62702 Microwave Oven

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