Question about Sharp R-1492 Microwave Oven

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Loud buzzing noise, lights going off and on and slight smell in microwave

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By your description it is the magnetron that has become defective, "heats food" cheaper to replace the unit.

Posted on Apr 08, 2011

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Posted on Jan 02, 2017

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When microwave is started, why does it make a loud buzzing sound--like a Skil saw sounds?


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GE Microwave (JVM1860CD001) control board buzzes.


see this causes and fix it. God bless you
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.
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Oct 10, 2012 | GE Microwave Ovens

1 Answer

LOUD BUZZING NOISE AND THE ANSWER I RECEIVED WAS FOR A DIFFERENT MODEL. CAN I FIX IT MYSELF?


If the loud buzzing noise is present when cooking food, the magnetron is the likely cause, some models are louder than others. But if the buzzing noise is there without the microwave running it should be checked. No! this something that should be checked by a professional for safety.

Mar 17, 2012 | GE Monogram ZEM200SF Microwave Oven

1 Answer

Microwave makes a loud buzzing noise and emits a burning plastic smell


This indicates the magnetron has failed, buzzing sound and odor are classic symptoms. It is cheaper to replace than have it repaired.

Apr 03, 2011 | Kenmore Microwave Ovens

1 Answer

My Kenmore 721.626222 which I have had about 6 years, runs but does not heat. There is also a strange smell - something like a burning smell.


When the oven does not heat, the problem is usually due to the magnetron failing. It the part that generates the microwaves that heat the food. It fails by shorting out causing a loud buzzing noise. The burning smell is the being magnetron overloaded due to the short. It not worth fixing since the replacement cost of a magnetron is close to the price of a new oven. Sorry.

Feb 09, 2011 | Kenmore 62622 Microwave Oven

1 Answer

Heat element not working


Well, if there is not heating the food and making a loud buzzing or humming sound when it is on, then the magnetron has failed. It typically shorts out and fails. The magnetron for this cost $140 plus the cost of the service call, you're better off buying a new oven. Hope this helps.

Jul 07, 2010 | Frigidaire FMV156EM Microwave Oven

1 Answer

Microwave running but no heat


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heatman101
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May 09, 2010 | General Electric Microwave Oven

1 Answer

Loud buzzing noise with Whirpool microwave oven when it comes on. All lights, heating and fan seems to work but not sure why loud buzzing. What is the problem?


The loud buzzing you hear is the sound of the magnatron tube.That is what emits the microwave radiation and buzzing should be normal. The mag tube may be nearing its end at witch time you will hear no buzzing and hence no heating of foods. Replacement can be costly depending on the model so most people just opt for a new one. Hope this helps

Jul 30, 2009 | Microwave Ovens

2 Answers

Microwave makes loud noise and does not heat. Smell of light burning


yes anything can be fixed but a do it yourselfer i reccomend against this cause thats a radiated element in the micro
recommend go out and purchase a replacement go with G.E. they have the 7 year warranty great little micro. too change out is easy

Jun 02, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Microwave makes loud noise and does not heat. Smell of light burning


The noise is coming from the high-voltage transformer being overloaded by something shorting it out. Either the magnatron or the high-voltage capacitor and diode. Replace the capacitor and diode then if still not working, replace the magnatron. Its only affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"
Hope ya fix it!

Feb 06, 2008 | Whirlpool GH8155XJ Microwave Oven

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