Question about Sharp R-1511 Microwave Oven

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Model R 1511 over the range microwave. My wife was heating water in it when it sounded like an M80 went off. Door popped open. I unplugged unit and allowed it to cool for an hour. Plugged it in and nothing. No light, no fan, no display. Pull unit out and opened case. Using a multimeter I checked fuse, blown, and I checked cut outs. The hood fan thermal cut out is bad. The magnatron cutout and fuse are fine. Should I replace the bad fuse and hood fan cut out and try it or could something else be wrong?

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  • 9,085 Answers

The hood fan thermal cutout is probably not bad. It should read normally open, unlike the others, which would read normally closed.

What probably blew the fuse was a blown high voltage rectifier diode.

At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)


http://www.gallawa.com/microtech/mag_test.html

You can order the diode from Encompass here.

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

Posted on Apr 05, 2011

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

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