Question about Whirlpool GH8155XJ Microwave Oven

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Makes loud hum noise but does heat - Whirlpool GH8155XJ Microwave Oven

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That is a symptom that the magnetron circuit has failed. It the part that generates the microwaves that heat the food. Not worth fixing since the replacement part can cost as much as as a new oven. Sorry.

Posted on May 24, 2011

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daverh
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SOURCE: Makes a loud humming noise while operating

Almost certainly, the component called the "magnetron" has died. This is the valve (tube in the US) which actually generates the microwaves. The loud humming is the transformer that supplies the magnetron being overloaded and/or the magnetron itself. If the rest of the appliance is OK and not too old, the magnetron can be replaced. If you aren't familiar with these appliances, you *must* get this done by someone who understands the dangers of messing with them - if you get it wrong, they can bite! In some countries, only qualified engineers can buy the spare parts. In the UK, the part costs around £40 - £80, depending on the model. If the appliance is more than around three years old, it may be a false economy to repair it as other parts may fail soon after the repair.

Posted on Sep 24, 2007

  • 111 Answers

SOURCE: GE Spacemaker XL1800(JVM1850CF001) - Loud Humming noise

You either have a bad magnetron tube (5 or 10 year parts warranty item through GE Factory Service 1-800-432-2737 or www.geappliances.com) or a shorted high voltage rectifier. I think the light being out is a secondary problem.

Posted on Dec 20, 2008

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My JES636WK01 microwave heats up but it makes a loud humming noise. I suspected the Magnetron and disconnected it. The microwave was then operated and the n oiuse was the same. Do you have any ideas


Disconnect the HV transformer leads from the magnetron and the capacitor. Make sure none of the wires are touching the chasis or other parts. If the loud humming sound is still present, it is the High Voltage transformer making the noise. If the noise goes away, it is the High Voltage Capacitor going bad.

*MAKE SURE TO UNPLUG UNIT BEFORE TOUCHING ANY OF THE HIGH VOLTAGE LEADS! ALSO, DISCHARGE THE CAPACITOR BY SHORTING THE TWO SIDES AGAINST EACH OTHER!

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From your description it sounds like the magnetron has failed in this oven. That's the part the makes the microwaves to heat the food. It typically fails by shorting out and making a loud hum noise. It not usually worth fixing since the price of a replacement magnetron is almost as much as a new oven.

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if its making a loud humming noise you need to remove the outer and carefully discharge the high-voltage capacitor in the magnetron circuitry(caps are usually oval in shape and 3 to 5 inches long) after this disconnect one terminal of the cap and check it for being open,then do the same on the high-voltage diode and check this for front to back resistance high in one direction and lower with the meters leads reversed on the diode,the humming is coming from the transformer not being loaded by the cap and diode to double the voltage required by the magnetron tube of -2,000 volts D.C.

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Generic problem for all Kenmore Microwave


Loud hum is usually due to faulty hv diod, resonance capacitor, or the magnatrone feed thru capacitor , chk it with a ohm meter , one by one n replace it .. zaheer Islamabad

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1 Answer

It is making a humming noise but not heating.


sounds like a crack in the magnetron
a bad transformer
or a bad rectifier
sorry i cant be more help

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humming sound is your magneto going out Dont have any idea of the cost for replacement however it may be cheaper to purchase another microwave than to repair this one. Good Luck

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1 Answer

GE Spacemaker XL1800(JVM1850CF001) - Loud Humming noise


You either have a bad magnetron tube (5 or 10 year parts warranty item through GE Factory Service 1-800-432-2737 or www.geappliances.com) or a shorted high voltage rectifier. I think the light being out is a secondary problem.

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