Question about GE JVM1630 Microwave Oven

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Hello. My JVM1630 is not heating. There is a louder than normal HUMM when the magnetron is supposed to be on, and I can distinctly hear the hum starting and stopping intermittently when I set it to 50% power. Thanks in advance!

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  • GE Master
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Hi,


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Basic
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Posted on Feb 22, 2011

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1 Answer

GE JVM1630 makes a humming noise and doesn't get hot


It may be a shorted high voltage diode or a failing magnetron.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

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


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

You can find links to helpful exploded view diagrams and order parts here.

I'd recommend that your bookmark this link to your favorites.

Apr 16, 2013 | GE JVM1630 Microwave Oven

1 Answer

When you start the microwave it starts normally with a low hum, then a couple of seconds into it the hum gets louder. After the cook time has expired the food is still frozen. Is there something I can do...


Replace the magnetron by the sounds of it. The hum gets louder a second or so into "Cooking", that would comply with the magnetron heaters coming on and working into a dead magnetron. It could be capacitor or diode of course.

Dec 27, 2010 | GE JVM1540SMSS Microwave Oven

1 Answer

Microwave won't heat, light ,clock works the microwave just won't heat the items in it.


hELLO THERE
when a microwave quits heating but every thing else is ok normally
investigate these 4 areas

Investigate these three areas if your microwave won't heat but you hear a loud buzzing or humming noise:
microwave_diode.jpg Power Diode

A diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

picturena.gif High Voltage Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.

microwave_magnetron.jpg Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

Nov 09, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

The microwave is making a humming noise as it runs and the food does not get hot.


your high voltage capacitor or diode in the high voltage doubler circuit is open and can't help double the high voltage to operate the magnetron tube to make food heat

May 16, 2010 | GE JVM1630 Microwave Oven

1 Answer

Microwave works but is not heating up food


can you hear the magnetron operate i.e. light dims,transformer has a louder hum,if so more than likely either the H.v. diode or H.V. capacitor is bad or worst case scenario the mag tube has failed.....costly

Jul 18, 2009 | Microwave Ovens

1 Answer

Load humming.(louder then normal.)


It does not heat.

I already replaced the HV diode. That did not fix the problem

It still has a loud hum and no heat. I'm guessing the magnetron.

The unit is six years old. I did not purchase it, the unit came with my house.

Model # JE1660MB002

Sep 24, 2008 | GE Microwave Ovens

1 Answer

Loud humming


Ouch. Magnetron check performed with multi meter.


1) Disconnect power to unit
2)Allow to stand for minimum 5minutes
3)Remove cover
4)Find large insulted screwdriver
5)short terminals of capacitor to dissapate charge. (If no pop or crackle its possbly already bled through resistor.

Right. Magnetron check both terminals for short to casing if shorted, replace. Check reading between terminals low resistance or direct short is not a problem. Open circuit, replace.

For non heating, this is usually barrel fuse, typically HV 5Kv or more, faults in an overcurrent situation.

Check the capacitor for shorts to casing, a short will indicate a failure. Check the diode in the capactior if fitted by reverese continuity check accross the terminals. MUST DISCHARGE FIRST, else you'll blow the meter up and likely recieve a SEVERE burn.

The most common cause would have to be a problem with the capacitor next the transformer for loud humming. Three basic checks for the transformer.

Probe the low voltage side first, open circuit? replace. a low reading is normal, high voltage side is a two part process, take a reading between the two terminals one goes to the magnetron the second to the capacitor directly. this should be approx the same reading as the LV coil. The last and most important coil is to check the coil side ofthe barrel fuse to ground, this will measure between 80 - 150 on a digital meter, around 90 to 100 for a 900w is in the normal range.

Loud humming is created primarily by having a working transformer with no wher to send the voltage out.

It will only be one or more of these three items, which will cause this, the rest is safety and control gear.


Jun 14, 2008 | GE JVM1630 Microwave Oven

1 Answer

Microwave no heat


The "HUMM" indicates a breakdown in the High Voltage Side. The loud "POP" was the breakdown. You have only four Components in the High Voltage side.

1. High Voltage Transformer. You can eliminate this as the problem. Why? If it was the problem it would have blown the line fuse, and would have given off a burned transformer smell.
2. High Voltage Diode. Usually will Burn or Pop when shorted, but will then OPEN the Circuit and there is no "HUMM".
3. High Voltage Capacitor.This is the Silver Can with the two terminals on top. It can SHORT internaly between the plates (the two terminals) and give the "HUMM".
4. Magnetron. This is my number one suspect. A SHORTED Magnetron.

Feb 03, 2008 | Kenmore 63652 Microwave Oven

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