F9 kenmore 72163763300 - Kenmore 62622 Microwave Oven

Microwave Error Code F9 Troubleshooting

F9 is inverter related.

The F-9 error code indicates a defective control board, inverter or line voltage too high.

You can also visit the link to troubleshoot the issue.

http://www.ehow.com/how_7987910_troubleshoot-code-f9-kenmore-microwave.html

That sounds like a problem on the invertor board. Unfortunately there is not a lot to be done on the board without a service manual and the needed experience.
Hope that helps.

ManualsLib Makes it easy to find manuals online
try the link below and search on model for service manual or try other free manual sites.

My Kenmore Elite Microwave Model No. 721.64683300 does not seem to be heating well and will shut off and flash an F9 code. What does the F9 code mean

There could be one of many possible failures causing the "F9" fault code. It could be a loose wire connection between the magnetron, control PCB or the inverter. It could have failed PCB, inverter module or magnetron. I recommend calling a service technician to diagnose and repair your microwave. NOTE: Do not attempt to

F9 indicates a problem with the door latch.  There is a safety switch that will not allow the microwave to operate if it detects the door is not closed properly.  Even though physically it may seem the door is shut, the safety switch is not relaying the message to the onboard computer.  You need another door latch switch.

Seems like I answered this, but maybe it's a different poster.

The 721 model code means it's an LG/Goldstar-made oven and F9 indicates a problem with the inverter or magnetron.

Due to the lethal voltages involved, I do not recommend that a person without training and experience ever work on these models.

I would suggest you contact Sears for service.

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

F9 is an error that indicates an inverter board or magnetron
has failed. With the F9 error cleared, start the oven and
listen for a ticking sound. The inverter will attempt to
'fire' the magnetron 5 times.(ticking sound). If can hear
ticking, replace magnetron. Check owners manual. Part may be covered by limited warranty.