I have a Kenmore Microwave Model #: 665.69619991. The first problem I had was the microwave was not heating up anything that was placed inside. Everything else still functioned. So I decided to research online on what the problem could be. I read that it's possible that one of the door switches could have gone bad.
So I opened the door of the microwave and looked at the switches. While it was still plugged in I pushed the bottom switch to engage it (the top door switch was disengaged.) The microwave shut down completely. No lights, no display, no beeping when you touch the buttons... you get the picture. I thought I either blew a fuse or tripped the main circuit breaker. I tested the outlet with another electronic device, it was fine. This tells me the problem is inside the box.
Advice is needed and most welcomed.
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Kenmore Master
9,179 Answers
Re:
We have critical safety information, door switch information, and disassembly information at our site.
You can access it through our listing here on FixYa: http://tinyurl.com/yzjozk
The purpose of the middle "monitor" door switch is to blow the fuse if the upper or lower switch gets activated with the door open.
So you'll also need a fuse now, certainly.
You may have originally just had a bad door switch, but there also may be a problem in the high voltage section.
Most typically a bad connection at the magnetron or a bad magnetron.
You can find exploded views of the microwave and affordably order parts here http://tinyurl.com/gv383
Or you can order parts from Sears via http://www3.sears.com
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This is normal. Kenmore microwaves will stay running with fan and light on for a short time after food is cooked. The reason is to air out the microwave after cooking. Things like pop corn, Bacon etc. have strong smells after cooking. The ventilation helps to remove odors.
Chances are that is just a defective top or bottom door switch or its mount. See our help file on door switches here. Also, that model number does not show up as a valid US Kenmore model. Please check the tag in the cooking cavity or elsewhere n the oven and let us know if you need further help.
If it has a platter does it turn? (possible safety switch in the door issue) Other than that a Diode, inverter board (diode might be on it) or the Magnetron bad.
The most likely cause is a bad magnetron, "heats food" the other two possibilities are the high voltage capacitor and diode. The cost to repair will a approach a new microwave oven.
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