Question about Sharp R-1481B Microwave Oven

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A little louder than normal;no heat

Sounds a little louder than normal and there is no heat. Turntable and light come on. All else sems to be functioning properly.

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  • 9,098 Answers

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

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.

Accessing some components for testing and possible replacement will require you to remove the oven from the wall.

If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.

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, it's probably okay)


http://www.gallawa.com/microtech/mag_test.html
(even if the magnetron passes these tests, it can still be bad. If you have high voltage and the diode is good, assume the magnetron is bad)

NOTE: FixYa's Web site is currently not notifying us when replies to our Clarification Requests are posted.

So please reply back directly to me with your brand and full model number from the tag in or on the unit for more help or free do-it-yourself tips or an estimate if required.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer

Posted on Sep 28, 2009

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