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KitchenAid KHMS147 Microwave Oven - Page 8 Questions & Answers
Kitchenaid Superba KEMS307D Microwave buzzes, looks like it works, but doesn't heat. Full normal display, tray rotates, but fan doesn't sound normal.
Most likely causes - shorted high voltage rectifier, or failed high voltage transformer, or shorted high voltage capacitor, or shorted magnetron. If an odor accompanied the failure, high voltage rectifier or transformer most likely. All of these components operate on 4000 v, or more - with enough current to kill you. Make sure the unit is unplugged, and the high voltage capacitor is fully discharged before testing. If you need further help, I’m available over the phone at
https://www.6ya.com/expert/david_29ad5d1dd86564b0
Vent fan turns on by its self and it will not turn off
(I'd say it's a failed or failing thermostat on the
control circuit board or the hood TCO / thermal cutout / thermostat)
And if FixYa would inform us experts when as persons responds to a request for more information, we could reply back quickly.
But since (for some reason) they won't, you'll just have to post a new help request.
But please be sure to include the full model number from the tag on the oven, and exact symptoms - what it's doing or not doing, and when.
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