Question about Sharp R-360E Microwave Oven

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Sharp r-360e problems

Today i tried to use my microwave that i have had for about 4 years. when i turned it on it stated making loud buzzing noise and not heating up my food at all

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This is most lkely caused by the shorted high voltage rectifier diode or magnetron.

If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa:

You can probably find an exploded view by entering your FULL model number here: (the 3 is correct)

You can order Sharp parts there or from Tritronics at

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

Posted on Dec 17, 2007


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Posted on Jan 02, 2017


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My r880f microwave has lost its microwave function only grill etc still works any ideas ?

It could be that the magentron has failed. Does it make a loud hum or buzzing noise when you try to use the microwave only function? If it does, chances are that the magnetron has shorted out. The replacement cost can be as high as the cost of a new oven, so it rarely makes sense to fix.

May 24, 2011 | Sharp Microwave Ovens

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I bought a Sharp Carousel 1100 watt microwave about 8 months ago but now it makes a louder noise when it's on and it doesn't heat. Can I easily fix this myself or is this now trash?

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.

Since it's less than a year old, it's fully under warranty and Sharp will fix it free.

You can contact Sharp at 1-800-BE-SHARP (1-800-237-4277) or visit them online to get it fixed.

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

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Loud buzzing noise when operating

This is most likely a shorted high voltage rectifier diode, but the magnetron may be bad as well.

Here are some links you or someone you know can use for test help, but read their safety warnings first:
(if it's not shorted or burned, it's probably okay)

Info on ordering Sharp UK parts / spares is here.

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

Jul 10, 2009 | Sharp Microwave Ovens

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Makes a loud buzzing noise and does not get hot

Have seen this many times.

Sounds like a bad CAP since a bad diode would blow the fuse and a bad mag would likely do the same thing.

Since yours is making the loud 60hz buzz you need to replace the capacator that will likely fix the problem. A $10 fix

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I have a GE counter top microwave oven. When the oven starts cooking (the magnetron turns on) the oven makes a harsh buzzing noise. What is wrong and what should be done?

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Loud noise

If you mean a loud buzz that cuts on and off as the oven works, it is probably the outer metal cover vibrating as the magnetron powers up and down. Try holding/ pushing/ poking the metal cover while the oven is working, if the noise abates or goes away, this is the problem.
You may get relief by simply tightening the screws securing the cover, if not, maybe a little careful insertion of a thin strip of cardboard or similar, at the point the vibration occurs, may dampen it. Good luck.

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