Question about Kenmore 64683 Microwave Oven

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My Kenmore UltraWave 721.64683 stopped heating last night. Everything else seems to be operating fine. This morning I thought I would try again and got the same result but an F-9 showed up in the window. Flipped the breaker for a couple of minutes, which corrected the F-9 but still no heating. Any thoughts? Microwave is 7 years old and I just replaced the inverter board 6 months ago! Toss or repair?

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: F-9 Error on Kenmore Ultrawave Microwave Model 721.64682300

From everything I have read it is a 1100w inverter, I am having the same problem.

Posted on Jun 09, 2009

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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

fathitkf
  • 1871 Answers

SOURCE: My Kenmore Elite will not heat has F-9 on display

Hello :
F-9 error code indicates a defective control board, inverter module or line voltage too high You can try unplugging or disconnecting the electrical power to the unit for at least 50 seconds to see if this solves the problem, if not then I recommend to replace the inverter module, if this does not solve the problem then the control board will have to be replaced. If that didn't solve the problem , then call for repair .
I hope this will help .
Please rate !

Posted on Mar 28, 2010

fathitkf
  • 1871 Answers

SOURCE: F-9 pops up - microwave stops after 5 seconds.

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 !

Posted on Apr 04, 2010

blueextc3221
  • 15935 Answers

SOURCE: What does an error code of F-9 mean on a Kenmore

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


http://media.fotki.com/1_p,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.

Posted on Sep 25, 2010

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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?).
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** "UltraWave technology"/"SmartWave technology" **
I'll explain a few things about this wonderful technology...
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