Question about Kenmore Microwave Ovens

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F7 Error code on Kenmore Ultra Wave Microwave Hood Combination Model 665.61652100

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On the tech insert found in a cavity under the cover of my Kenmore MHC, the F7 code means the inverter board ($90 - $130 street price Fall 2008) is bad and needs replacement. I am having this problem, and verified that the magnetron was not shorted to ground with an ohm meter. I verified with a volt meter that the magnetron was not getting any voltage applied across the cathode from the inverter board when the microwave is running ("WARNING"- don't do this test with the magnetron connected.) I have an inverter board on order.

Posted on Oct 05, 2008

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The 665 the model number prefix means it's made by Whirlpool. F7 means it has a problem with the control board or keypad.

The first thing to try is a "hard reset". Unplug it from the power line for a minute, plug it back in, set the clock, then try again.

If it still has a problem, we repair these for customers nationwide with our guaranteed $39.95 service. If a new keypad were needed, that would add about $60 to the repair cost.

Please feel free to contact me directly if you need more help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on Jul 04, 2008

  • cooncielo
    cooncielo Jan 22, 2012

    Be advised, the website this guy is promoting states that they will contact you with progress about the repair progress of your microwave display and that it should be shipped within a couple of weeks. That's a bald face lie. This guys cashes your check and then never gets back to you. Don't use his repair service.

  • cooncielo
    cooncielo Jan 22, 2012

    Be advised, the website this guy is promoting states that they will contact you with progress about the repair progress of your microwave display and that it should be shipped within a couple of weeks. That's a bald face lie. This guys cashes your check and then never gets back to you. Don't use his repair service.

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Twice my new kenmore microwave has just started beeping with the error code E11 appearing on the screen.Have to unplug it to stop it. WHat is going on?


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Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

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


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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.

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You can find exploded views and order parts by entering your 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.

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Please reply back with your model number so we can help you.

A full Sears/Kenmore model number usually has 3 digits, a dot, then 8 more digits, such as ###.########

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