Question about Kenmore 62622 Microwave Oven

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Kenmore elite utra microwave 721.63763300

When i turn on my micro wave it works after 7 seconds it stops and an error code of F-9 comes on the panel what does this mean my email is

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  • E baker Jan 20, 2008

    I am also getting an F-9 code on my Kenmore Elite microwave the model number is 721-63684300. It will work for a few seconds and shut off.

    It is not heating when it does work.

  • orchestra Jan 21, 2008

    it doesn,t heat a cup of coffee takes 2 min

  • skruffy Feb 29, 2008

    f9 appears after 7 seconds for model 721.63763300

  • Joe Rizo Jul 14, 2008

    Same problem with Model # 721-63662300. Shuts down & shows error code F9 after a few seconds. Very slow to heat even when it worked.

  • Anonymous Feb 26, 2009

    After a few seconds my Kenmore Elite Microware gives me a F9 error

    code. I tried several times, but Sears will not tell me what this means.



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Your model number prefix of 721 means it's made by LG / Goldstar.

F9 code on an LG means either a bad door switch or a loose door switch mount.

Even though a door switch clicks, it may still be bad inside.

This can be caused by slamming the door or by habitually opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:

You can find helpful exploded view diagrams and order parts by entering your full model number here: (the 3 is correct)

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

Posted on Jan 20, 2008

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My Kenmore 721.80803401 Microwave has a problem with the turntable. When it starts to turn the arm jumps out of the groove in the glass turntable, when it does it makes loud noise and sometimes goes in the opposite direction.Even the moving table on the bottom jumps out of the track sometime.

Do you have any solution. Thanks

Posted on Feb 29, 2008

  • steveKfitit Aug 25, 2011

    I have exactly the same problem. Checked everything I could think of, arm raising out of socket, sticking rollers, dirt in tracks but nothing seems wrong. Very frustrating



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My Kenmore Elite Ultra Wave Technology microwave is displaying an F-9 error. What does that mean?

Here are a couple of quotes from another forum:

"Kenmore Elite 36 " over tne counter microwave is supplied by LG made by Gold Star, made in China. It's main problem is the high voltage inverter board supplyed by Sears Parts. If you get a F-9 code on your microwave display screen and the micro quits it's probably this board. Reset the machine by pulling the power plug and waiting an hour. If it is the high voltage board is at fault it will probably fail after 45 seconds of start up. This part is really hard to get at but is less than $100. A qualified technician should be able to remove and repair this item in less than hour. Some techs will quote you $300 labor, don't buy it, it should cost a $100 or less. No need to buy another microwave."

"F-9 on this microwave IS inverter related. There is a service tech troubleshooting document stuffed in behind the control board cover which has some testing proceedures. My problem was the magnatron and checked out bad with the help of this document. It would run for a few seconds making clicks and then say F-9. It has been working great since I replaced the magnatron PN 6324w1a002c."

Note that part numbers mentioned may not for your model.

You can usually find exploded views and order parts by entering your model number at the Sears parts site.

BUT once you have the part number from the Sears parts site, you can often get the parts cheaper here

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

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F-9 pops up - microwave stops after 5 seconds. This is a Kenmore Elite Microwave, made in 2003. Model 721 63683300

Hello :

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

WARNING : A microwave is capable to give you a serious electrical shock even when it's unplugged , so I recommend you to call a repair technician for help .

good luck .

please don't forget to rate !

Apr 04, 2010 | Kenmore Microwave Ovens

1 Answer


The Magnatron is a major job and unless you first looked into or had the Inverter Board replaced, you are wasting your time. 90% of the F-9 problems fall into the Inverter solution, Try that 1st, it worked for us!! My Micro now works GREAT!!

Sep 09, 2008 | Kenmore 62622 Microwave Oven

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F9 code can mean something different depending upon the particular model.....
1.) IF your Microwave uses "UltraWave technology"/"SmartWave technology"...Then either the Magnetron has failed or the Inverter board has failed OR maybe the control board has failed (HUH?).
2.) IF your Microwave does NOT use "UltraWave technology"/"SmartWave technology" then one or more of the door switches has failed.

** "UltraWave technology"/"SmartWave technology" **
I'll explain a few things about this wonderful technology...
The control board (accepts the pushbutton commands) has to talk to the inverter board to tell it how much power should be applied to the magnetron. The inverter board will then power the magnetron and inform the control board if the magnetron is working OK.
If there is something wrong with the magnetron or inverter board or a there is a communication breakdown between the control board and the inverter board...WA-LA-----F9----

A pretty reliable test for the Magnetron is to operate the oven and listen for a ticking sound 5-6 times about a second apart. If you can hear the ticking....The magnetron has failed..if no ticking, the control or inverter board failed.

Note: This 'technology' may come in other flavors as well

Jan 19, 2008 | Kenmore 62622 Microwave Oven

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