Question about LG MB3940GS Microwave Oven

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Not heating any of meals placed in the microwave, plate is rotating,light is ok,also produces the sound as if it is working,but no heating of stuff in oven

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Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101 '
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Posted on May 20, 2011

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Posted on Jan 02, 2017

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Why does my brand new microwave produce lots of internal moisture when heating ready meals?


The new oven is providing more heat to your food, causing more water to boil out of it by the time it is done. It may be OK to shorten your cooking times in response to the higher power efficiency if it bothers you. Then again, maybe you bought a microwave steam oven. They're cool.
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Feb 23, 2015 | Microwave Ovens

1 Answer

Sunbeam microwave not heat


Place a glass pie plate in the oven with about 1/8" deep water in it. Turn the oven on high for about 30 seconds. If you get one small spot with intense boiling, the stirring antenna at the top of the oven is not rotating. It's usually driven by a small 60 RPM synchronous motor. To get at it, look for a pull-out plastic locking pin that holds the plastic dome or plate to the tope of the oven cavity. You may need to rotate the cover counter-clockwise a fraction of a turn to unlatch it. Sometimes greasy food vapor gets in there and gums up the bearings. Clean very thoroughly, but be careful not to bend the antenna blades. When you reassemble, make sure the antenna is properly seated in its bushing and engaged on its drive shaft. Repeat the test to see if you have even heating.

If you see no evidence of heating anywhere in the oven, check to see if the door switch in series with the transformer is malfunctioning. If the door switch is OK, you'll need a high-voltage measurement probe to determine whether the magnetron has failed, or (more likely) the high-voltage capacitor or diode is bad.

Apr 15, 2014 | Sunbeam Microwave Ovens

1 Answer

Siemens HF26066GB plate is moving when door closed and not moving when open


Have a shop look at this---there usually is a recessed safety switch inside the jam that will prevent the unit from working with door open--sounds like the problem may be with it.

Nov 03, 2012 | Siemens HF26066GB 1000 Watts Microwave...

1 Answer

Microwave MH6140XKQ doesnt want to start


Toss it out. The transformer is likely bad.

Nov 18, 2017 | Whirlpool MH1140XM Microwave Oven

1 Answer

Lights working..plate rotating. normal sound is heard but not heating food on any level


Hi,


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

Microwave Oven Basic Troubleshooting Tips

heatman101

Jan 24, 2011 | Baumatic BTM231SS Microwave Oven

1 Answer

I hv a 24ltr Sharp Carasoul Microwave. Few days back, its plate stopped working, but its heating the food fine. Why has the plate stopped rotating? Will the food be evenly heated even though the plate...


> Why has the plate stopped rotating?

The turntable system typically consists of the motor, the coupler, the turntable support with rollers, and the tray.

Here is a video of how a turntable motor should sound when you rotate it by hand.

If yours is not set to be off via the control panel, and it won't rotate or it sounds like it's grinding, etc., you may have a bad motor or plastic coupler.

To replace either, you need to unplug power, then remove the bottom cover of the oven.

You order Sharp parts Encompass here or call them toll-free at 866-779-5835.

> Will the food be evenly heated even though the plate is not rotating?

No.

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

Sep 07, 2010 | Sharp R-1480 Microwave Oven

1 Answer

Light's on, plate rotates, no heat


When the microwave works properly but just doesn't heat, then the magnetron is bad and will need to be replaced. You can get the part and the diagram at partselect . com or repairclinic . com

Jul 11, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Food won't heat up


Hello, I had the same problem, and just fixed mine. Start by turning on your microwave (on mine, the light turned on and timer worked, but the fan nor the plate turned)... push the door upward and see if the microwave turns on... (mine did). so far so good. open the door and take the upper hinge cap off with flat head screwdrive. take the door off and place a small washer on the bottom hinge, put the door back on. your microwave should be good now. essentially, the door just needs to be pushed up a bit so it will work.
good luck, hope that works for you...

Jun 01, 2010 | Frigidaire FMV156DC Microwave Oven

1 Answer

I have a GE spacemaker JVM1542 that is not heating the food, the noise level is louder, light works, plate rotates.


sounds like its not producing any high voltage for the mag tube, check your h.v diode, then your h.v. capacitor for being open

Oct 09, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Emerson model MW8117W Microvave


If the microwave is rotating & the light is on, then the door switches have been satisfied. Some times the connections to the magnetron get crystalized. I have repaired mine just by pulling the leads to the magnetron on and off a couple of times, When testing always have the microwave loaded with at least a glass of water. And be careful because the capacitor in the microwaves hold a charge. Short out and drain the capacitor by touching both termnals with a metal objest like a screwdriver. Or unplug the leads on the capacitor befor beginning the repairs.

May 18, 2009 | Emerson MW8108P Microwave Oven

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