Question about GE Microwave Ovens

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We have a JNM1851DBB GE Microware oven. The microwave is not generating any heat and the motor sound is much louder than normal.

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The magnetron may have either failed or is not being supplied with the extremely high voltage required to run it.
Make sure the !!!!capacitor is discharged!!!!! before attempting any sort of repair.
Check the door interlock switches first then the high voltage diode with either an AVO model 8 on high resistance range for short circuit, the feed fuse on the primary of the high voltage transformer and then finally, the magnetron is best checked by substitution.
Hope that helps.

Posted on Nov 12, 2010

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Posted on Jan 02, 2017

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1 Answer

Microwave runs but doe not heat


follow this test and fix it. God bless you
  1. Check the power diode This electronic component is responsible for transmitting current in one direction. If the diode becomes defective it will cause your microwave to not heat. Test the diode and replace it if necessary.
  2. High voltage capacitor Responsible for storing electricity, this part is a key component in any microwave. Remove, discharge, and test the capacitor to determine if it requires replacement.
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The magnetron has failed, "heats food" to repair the unit will approach the cost of a new microwave oven.

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1 Answer

The keypad works; the microwave can be turned on and turntable turns round, the light is on, the motor sounds (a little louder than normal) but no heat can be generated. What could be causing this?


No heat would mean the magnetron circuit has failed. It's the part that generates the microwaves that heat the food. If it is making a loud buzzing noise, it could mean that the magnetron or the high voltage diode has failed. Since there exists high voltages inside the oven, would require a qualified service person to repair. However, if the magnetron has failed, would recommend buying a new oven since the parts alone can cost as much as a new oven.

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1 Answer

Turns on but not heating food sounds a bit louder


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1 Answer

Motor sounds louder than normal. food won't heat up.


This sound like the Magnatron (this warms the food) has gone out and needs replaced! To be honest with you ,unless you can do this repair yourself it might be cheaper to buy a new oven
I hope I was of help!
(Please rate! This is what keeps this site free!)

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The light inside the microware


1 take the front grill off. 2. you will see a cover with one screw around the area of the light. normally this is right in front.

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GE MICROWARE WON,T HEAT UP


Likely problem: Blown magnetron. On microwaves, this can generally go dead, usually with a popping sound. Solution: A: Call an appliance repairman to replace the magnetron in the device, or B: buy a new microwave. Depending on how much you paid for it, you might be getting a better deal on either end.

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