Question about LG LRM1230W Microwave Oven

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When i turn on the microwave a loud buzzing starts. the turntable still works.

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  • 9,047 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.
Here are some links you
or someone you know can use (in order given) for test help, but read
the safety warnings first:



http://www.microtechfactoryservice.com/xformer.html
http://www.microtechfactoryservice.com/cap_test.html
http://www.microtechfactoryservice.com/diode.html
(if it is NOT shorted or burned looking,
it\'s probably fine)
http://www.microtechfactoryservice.com/mag_test.html
(continuity can be good even
though mag is bad!)

http://www.microtechfactoryservice.com/xformer.html

You can order
parts for this brand from
Encompass here or you can call them toll-free at 866-779-5835.
We\'re happy to help you with free advice and we\'d appreciate your
thoughtful rating of our answer.

Posted on Aug 22, 2010

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1 Answer

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1 Answer

Change Motor but turn table does not turning?


test the following steps and fix it. God bless you

Turntable Motor

If the microwave turntable doesn't turn the turntable motor might be worn out. This is a common problem and relatively easy to replace.


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Touchpad and Control Panel

If the microwave turntable doesn't turn the touchpad and control panel might be defective. This is not common. Test the turntable motor first.





Touchpad

If the microwave turntable doesn't turn and the touchpad has a button to turn the turntable on and off the touchpad might be defective. Check the turntable motor first, that is more likely.





User Control and Display Board

If the microwave turntable doesn't turn the turntable motor might be worn out. This is a common problem and relatively easy to replace. If the motor is good, the user control and display board may be defective.




Main Control Board

If the microwave turntable doesn't turn the turntable motor is usually the problem. If the motor is good the main control board might be defective

Jun 16, 2013 | 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

1 Answer

Frigidaire PLMV168K2 micro wave stopped heating food. Still has turntable and light functions. Seems to have more of a power load after initial start. The buzz is more intense than normal.


A loud buzz is a symptom of a shorted magnetron or high voltage diode. Would recommend that you take it to a qualified repair facility if you want it repaired, but if the magnetron has failed, the part costs can equal that of a new oven.

Dec 06, 2010 | Frigidaire PLMV168 Microwave Oven

2 Answers

Display works, turntable turns, but it won't heat.


If it making a loud humming or buzzing noise when it is turned on, it could mean that the magnetron has failed. If that is the case, then it typically not worth fixing, since the cost to repair is almost as much as a new oven.

Aug 23, 2010 | General Electric JEB1860 1100 Watts...

1 Answer

Microwave runs, turntable turns, fan runs, but does not heat,


No heat means the magnetron circuit has failed. It is the part that generates the microwaves to heat the food. Usually not worth fixing since the magnetron costs nearly as much as a new oven. To diagnose, if the oven is on, you will hear a loud buzzing sound if the magnetron is shorted.

Jun 30, 2010 | Sunbeam SMW777 Microwave Oven

1 Answer

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:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)


http://www.gallawa.com/microtech/mag_test.html

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

1 Answer

Dacor DMT2420s when started makes a loud buzzing sound


The fan could have an obstuction. I have heard of tech sheets getting into the fan and causing a vibration and vibrating sound.

May 12, 2009 | Dacor DMT2420SS Microwave Oven

2 Answers

Microwave Buzzing, Still Heats, but Turntable And Fan Not Working


This is not safe. If the fan is not running, the magnetron will quickly overheat and be destroyed. We answered this in more depth in the other place you asked it.

Feb 24, 2007 | GE JVM1441 Microwave Oven

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