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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Re: sharp r-360e problems

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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Magnetron If the microwave is loud or noisy only when cooking, the magnetron tube might be defective. The magnetron uses high voltage, high current DC power to generate the microwave frequency that cooks the food. Under normal circumstances the magnetron is nearly silent. However if it is damaged or nearly burned out it can begin emitting high pitched or growling noises. It's not normally dangerous to use a microwave oven when it makes these noises, but they are an indication that the magnetron is almost dead and will need to be replaced.
Exhaust Fan Motor If the microwave is loud when running the fan motor might be
Stirrer Motor If the microwave is loud or noisy the stirrer motor might be worn out. The stirrer is a metal blade which slowly turns around, deflecting the microwave energy in a random pattern inside the microwave oven. As the motor nears the end of its useful life it begins to make grinding noises. The microwave will not heat food evenly without this stirrer, the motor should be replaced.
Turntable Motor If the microwave is loud or noisy the turntable motor might be worn out. This is a common problem and relatively easy to replace.

Oct 10, 2012 | GE Microwave Ovens

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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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buzzinsg / humming / loud or louder than normal .is probably the mag / it has failed and the trans is making that noise . if older than 5 yrs I would replace ans the mag is 100.00 + and w / labor you have paid for a new on but have the old one .**** ..

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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.

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1 Answer

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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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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