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

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

Posted on Apr 03, 2011

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I have a maytag model mmv1164ws when you turn it on makes a buzzing and smells like something burning!


Something is burning, there are high voltage parts in a microwave oven and they wear out. You probably need a new diode. Part number WPW10492276 google it

Aug 30, 2016 | Maytag MMV1164WS Microwave Oven

1 Answer

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


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Feb 03, 2016 | Whirlpool Accuwave Microwave Oven

1 Answer

Buzzing noise and burned smell


Faulty diode pack and possibly magnetron.

Mar 27, 2014 | GE JVM1631 Microwave Oven

1 Answer

Coleman EB15A - Buzzing noise from transformer area, no heat or fan


see this causes and proceed. 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 18, 2012 | Microwave Ovens

1 Answer

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

2 Answers

We were using the microwave the other night and it started making a loud noise like the fan was running (although the fan was not). We let it sit for awhile and try to use it again but the noise came...


The loud noise and no heat means that the magnetron has failed. It the part that generates the microwaves that heat the food. When it fails it shorts out, causing the transformer to heat up. That is what was causing the burning smell. The cost of a replacement magnetron is around $130-150 range so it may not make sense to have it fixed.

Mar 24, 2011 | Maytag MMV4205 Microwave Oven

1 Answer

Our JVM1850 makes strange noises, its lights flicker, the microwaves smokes and the unit emits a burning plastic smell. This unit is only 1 1/2 years old.


Hi,


Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Basic
Microwave Oven Troubleshooting Tips

heatman101


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Feb 15, 2011 | GE JVM1850 1000 Watts Microwave Oven

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

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

1 Answer

Burning smell and won't heat.


If it buzzes real loud it's probably the high volyage diode. However some times if it smells it's the transformer. Usually the diode is a cheap fix ~$10.00 but this model the diode is $50. It's number 50 on the link below. Let me know how it works out or you need anything else.

http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=JVM1440BH01&productCategoryId=0123370&brandId=0432&modelName=MICROWAVE&diagramPageId=00001&documentId=G0312014&pop=flush

Apr 19, 2009 | GE JVM1440 Microwave Oven

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