Question about Kenmore 64683 Microwave Oven

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Humming sound, F9 and dead

Kenmore model 721.64683 300

The problem initially started with a humming noise when microwave was operated. Then few days later, F9 error code appeared on the display panel. Now the microwave is dead wont even display anything on the panel.

Thoughts, ideas please?

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  • cdemaughan Mar 25, 2009

    I have the F9 code also but my oven still displays properly and heats at about half capacity. I got a hum for a few days also at first (more like a 'tweet'.

  • Anonymous Mar 19, 2014

    why does my kenmore oven display the F9 code

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  • 8,820 Answers

Seems like I answered this, but maybe it's a different poster.

The 721 model code means it's an LG/Goldstar-made oven and F9 indicates a problem with the inverter or magnetron.

Due to the lethal voltages involved, I do not recommend that a person without training and experience ever work on these models.

I would suggest you contact Sears for service.

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

Posted on Jul 19, 2008

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