Question about Kenmore 62622 Microwave Oven

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Kenmore ultra elite microwave hood combination

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 thanks

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Re: Kenmore ultra elite microwave hood combination

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

Posted on Jun 11, 2008

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Re: Kenmore ultra elite microwave hood combination

Hello again, Here is my Solution update on my Ultra Elite F-9 problem. After another cancellation on Sears part, they finally showed up! The man came in and replaced my Inverter Board. He had to take down the Microhood from the wall and place it on the floor. First he grabbed my scatter rug that my DOG sleeps on and was going to put my NEW VERY CLEAN MICRO on it! YUK!! I jumped and said........oh my!! Let me get a towel to put down on the rug to protect it better. (very suttle) It took him a little while to dismantle everything and remove the Inverter Board and replace it with the new one. Everything was put together and I helped him put it back up. To make a long story short....I have not had a problem since and it has been approx. a month now. YEAH!!!!!! He did say if it accures again, it probably is the other Item that is bad. So far so good!! I am thrilled that it works great. So I will suggest to everyone who has the F-9 problem....have the Inverter Board replaced! It is after all Warranteed. Best of Luck to you all......and great info site......Thanks, Debra

Posted on Sep 11, 2008

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Re: Kenmore ultra elite microwave hood combination

My Ultra Wave Kenmore Elite microwave has all of the symptoms you list above (reg501).  Is it worth the repair or should I invest in a new one?  Microwave is not under warranty.

Posted on Sep 11, 2008

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Re: Kenmore ultra elite microwave hood combination

What is the part # for inverter module sears cont find it thank john

Posted on Dec 05, 2008

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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.

May 25, 2010 | Kenmore 63662 / 63664 / 63669 Microwave...

1 Answer

F-9 Error code

The F9 error code indicates a failed inverter. If resetting the unit does not help you will need to have the inverter & harness checked.,wbgdfgsrsttwqwbxgtqsskgwtqkq,vi/kgdfkfrkkxkfdtftrfb/1/1303472/5961857/image45625img-or.jpg

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.

Jan 17, 2009 | Kenmore 80809 Microwave Oven

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

2 Answers

Kenmore elite utra microwave 721.63763300

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.

Jan 20, 2008 | Kenmore 62622 Microwave Oven

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