Question about GE Spacemaker JVM1640SJ Microwave Oven

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Jvm1850dm2 Burn Smell and louder hum ?

I have read that this could be the Asm-magnetron (GE Part Number: AP3860541) and/or the H.v. transformer (GE Part Number: AP3860593). What I am looking for an answer to is the testing method recomended in determining the item that is bad. Many Thanks !

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  • bandi42 Feb 18, 2012

    Also, I read the Capacitor (GE Part Number: AP2025931) could be an issue also.

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 19 Answers

SOURCE: Ge Spacemaker microwave jvm240 wv Micro hood combo.

sounds to me like the magnatron has shorted out. i don't know of a way to test them unless you have some high dollar equipment. a continuity test prob wont tell you anything. what reading did you get on the cap when you tested it?

Posted on Jan 06, 2008

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MicrowaveSvc
  • 9047 Answers

SOURCE: burned magnetron antenna

The average multimeter does not output enough voltage to forward bias a high voltage diode, so it will seem to read open. This is normal.

It still may need a new high-voltage diode and stirrer, and the cavity may be affected.

GE had a campaign (but not a recall, mind you!) covering several models.

Details are in their bulletin at http://207.234.249.73/mwd/ge_mw_mag_kit_bulletin.pdf

The parts kit (that GE used to pay for) is part # WB27X10489 and is shown in the photo below.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

Chances are GE won't cover any of this, but just in case you want to contact them, GE Customer Service is at http://www.geappliances.com/service_and_support/contact/

We're happy to help and we appreciate your thoughtful rating of our answer.

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Posted on Jan 20, 2008

  • 1 Answer

SOURCE: Buzzing noise and burned magnetron antenna

I have a JVM1630WB004 Spacesaver, about 8 years old. Following the advice here, I contacted GE and was successful in getting them to ship me the WB27X10489 repair kit directly to my home, free. When I pulled the old magnetron, it looked exactly like the pictures here. The end antenna cap was completely burned away, with obvious keating and discoloration of the waveguide near the antenna cap. I brushed and vacuumed the interior of the waveguide to remove any debris and installed the three parts in the kit. The repair worked perfectly! The oven seems to heat about 33% better than immediately before it failed. I am a bit concerned about the burned waveguide, but figured as long as the metal was not perforated, it should be fine.

Posted on Apr 15, 2008

  • 2 Answers

SOURCE: New GE Magnetron. Where does this new HV diode go?

Fixed it. There was a back capacitor fuse (I believe that's what it's called) on the old magnetron. I removed it and put it on the new magnetron. The HV diode is on the big silver capacitor and very easy to replace. I just didn't see it. It was definitely the magnetron and I hope that this new one comes with a warranty for 5 more years.

Posted on Dec 01, 2008

  • 338 Answers

SOURCE: GE Microwave strats, runs, but not heating and have bad odor

there should be 4 screws holding it in.. and one plastic connector with 2 wires in it that are plugged onto the mag..
the seal would be the gold colored mesh around the antenna of the mag. when you take the microwave down you would take the cover off and if looking at it from the back you would look towards the right side and there should be a thermostat there that may have started to burn up. if it is replace it and the wires.. the mag you just unscrew remove and install the new mag.

Posted on Jan 19, 2009

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1 Answer

Ge micowave browing oven (JES1288SH01) want heat up anything everything else work and i smell something burning when turn on


If it is louder than usual, you probably have a shorted high voltage rectifier diode.

If it's not louder than usual, you probably have a defective magnetron or high voltage transformer.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.

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

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

Oct 15, 2011 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Loud hum,louder than normal, when start is pushed and then high heat smell like it might start fire so I turned off. Would it be the transformer or the magnetron?


Hard to say. Usually the Magnetron and transformer are all one unit. More likely a short in the control board. If the oven is a built in and more than a few years old, it probably ode not pay to fix. If it is a counter top or over the range model it will be far cheaper to by a new.

Feb 07, 2011 | Whirlpool Microwave Ovens

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

2 Answers

GE microwv-doesn't heat, strong electrical smell, all else ok


The most common problem would be your magnetron. Check your purchase date, magnetron's usually have a five year warranty. Not a part I recomend trying to fix yourself (high voltage ).

Mar 11, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

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

2 Answers

My microwave sounds funny


This answer assumes yours is a GE JVM1640, as posted.

If not, please reply back with your correct brand and model.

Most of the time, this is the magnetron, which would have a 9-year warranty.

I would advise you to contact GE Customer Service at http://www.geappliances.com/service_and_support/contact/

We're happy to help and we appreciate your thoughtful rating of our answer.

Dec 07, 2007 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Maytag Rangehood Microwave Loud Humming


Sounds like you just fried your magnetron. Normally when they go bad, they make a very loud noise like what you described. The smell concerns me because you may have ruined the waveguide as well. If the magnetron burns through the protective painted surface of the waveguide, the waveguide is ruined. In most microwave ovens this means replacing the entire unit because the waveguide is not replaceable. Putting a new magnetron in a damaged waveguide will result in the same arcing and eventual failure. In addition to the magnetron, the following components are part of the same high voltage network: HV Transformer HV Diode HV Capacitor Magnetron Thermal Cut-Out Any one of these components could have also been damaged. I DO NOT recommend taking any voltage measurements inside the HV network. Potentials of over 4000 volts can be reached and make it very dangerous for the do-it-yourselfer. Taking resistance readings with the unit unplugged is strongly encouraged. If you decide to pursue a repair, inspect the magnetron tip and inside of the waveguide first. If the magnetron is melted and/or there are burn marks inside the waveguide, a new microwave may be a in order. This actually may be a better option than an expensive repair. I hope you find this advice helpful.

Jul 31, 2007 | Whirlpool GH4155XP Microwave Oven

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