Question about Kenmore 63792 Microwave Oven
I KEEP GETTING F9 ERROR CODE EVERY TIME I TRY TO HEAT SOMETHING UP
I have the same model. At first, I found a bad magnetron (short from filament to chassis ground). Figuring the inverter board was old and no way for me to test it, I replaced both the magnetron and the inverter board at the same time.
I STILL got the F-9 after the inverter tried several times to fire the magnetron. It alway quit after 30 seconds with the F-9.
I had already checked the continuity and function of the three door switches, but I checked them again. All good. All other checks I could do with an ohm meter, such as humidity sensor, thermostat, relay, and all motors: all GOOD.
So the only thing left to do was replace the control board. I bought a brand new one and installed it, and the thing still spews it's F-9 after 30 seconds! Excuse my anger, but ARGGGGHHHH!! I spent several hundred bucks replacing every major component. I took photos, so I know I got every wire harness back in the exact right place, with every plug hooked up just like new.
What the *** could still be wrong?
Posted on Nov 27, 2012
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.
Posted on Jun 02, 2008
In every brand I can find, F9 means there is an issue with a door switch or door switch mount.
If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk
You can probably find an exploded view by entering your FULL model number 721.6368330 here: http://www.searspartsdirect.com
We're happy to help and we appreciate your thoughtful rating of our answer.
William E. Miller, AS-EET
Posted on Apr 21, 2008
a 6ya Repairman can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
This is usually inverter trouble, but it may be the magnetron, controller, wiring, etc.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
To find helpful exploded view diagrams and get part numbers, you can just enter your full model number at the Sears parts site.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on May 20, 2009
SOURCE: I have an error code
I would like to repair the kenmore mocrowave myself, it has the error code f-9. Do I need to let the micrwave sit for a wile so the hi voltage can disipate from the inverter or magetron
Posted on Aug 07, 2009
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
Posted on Jan 19, 2010
I checked the owners manual and it does not list the fault codes. Manufactures leave this information out of the manual most of the time so you have to call them for service.
Call 1-800-4-my-home (sears) and tell them the problem. You will also need to provide the m# so have that ready when you call.
Posted on Dec 20, 2010
Tips for a great answer:
F9 is indeed a door switch error.
I would suspect that if the switches are good, a couple of wires may be reversed on them, or maybe one of the door switch mounts is broken.
There may be a wiring diagram in the oven, either pasted to the cover, or folded and stored behind the control panel.
If you can supply the actual model number (not 636xx, etc.) I can try to find a wiring diagram.
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