Question about GE Spacemaker JVM1640SJ Microwave Oven

4 Answers

GE Spacesaver over the range microwave oven

My first GE spacesaver just like this one lasted for 17 years. I have had this one for 5 and it just stopped heating. It turns onlike normal but nothing every heats up or defrosts. Any suggestions?

velettag

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  • SamHastings Jan 05, 2008

    Same as previous post. Looks like it is working, but nothing happens. Lights, camera, but no action.

  • signgirl01 Jan 06, 2008

    Same exact problem here! Our model is the XL1400 - has probably been used for 7 years (we've only been in this house for 1). Please help - we'd much rather find a cost effective solution than have it end up in a landfill!

    Thanks!

  • Faithsoars Jan 08, 2008

    Exact same problem. Last night it worked, this morning everything seems to be working but nothing heats. Is it something about January? I see all the posts were made this month. We've been in our home two years, and before that, it was the model home so it's really only had two years of service.

  • sclieu Jan 25, 2008

    Same here! Started failing yesterday morning, and no longer heats since. Weird that a lot of folks are seeing this problem at around the same time. Wonder if it's a HW/SW virus set to go off a certain number of years after manufacturing date.

  • HollyBuddy Feb 01, 2008

    Same here. It happened one time before too, and after a day or two and multiple attempts, it started working again. This time it pooped out last night. Everything else works but no heat. We just had a huge windstorm here, not sure if that has something to do with it?

  • sclieu May 11, 2010

    Ok, this is both a request for more information as well as some updates and information for others that are novice like me.



    First, the findings... I took an ohmmeter and tested the magnetron by touching it's 2 connectors. This resulted in no resistance (expected). I then touched each of the connector to the housing...this resulted in no resistance (NOT expected). From reading online, I should have seen infinite resistance. Assuming I'm correct (please, please, please), I went to remove the magnetron. Now, I read that the GE magnetron is under warranty for like 8-10 years. Well, mine is made in Oct 2000, and so I believe it's still under warranty. However, I also read that they will only replace the magnetron by an authorized GE installer....soooo my question is if there is a way for me to get a free magnetron from GE being that it's still under warranty, BUT I did the uninstall myself? Can I pay a service guy to order it and give him my 'bad' one?



    On to how it was done:

    I had to unmount the XL1400 from the wall. To do this, there are 3 screws on top of the microwave that was screwed through my top cabinet. These are easily removable. Next, I had to figure out how it was still mounted to the wall. I read some posting that says that there is a U bracket on the lower back of the microwave connected to a J bracket, and was trying to wiggle it out but that was unsuccessful. The microwave seemed like it was still bolted on with something in the back, so I went online to search more on what was holding it on. Unfotunately, 1 minute later, the microwave fell, but fortunately it only fell a short distance to the stove and it was still connected to the wall so the fall was slowed down..the mounting brackets just bented.



    I saw how it was connected. Basically there are about 3 notchlike things along the back bottom connecting it to the wall frame. To unlatch them, I should have lifted only the back of the microwave and not the front and back (hard to do with a stove in your way and top cabitnet didn't give much room either to lift up). In any case, it's out.



    I then had to remove the front control panel (a bunch of screws here and there), disconnect the connectors. Ddon't forget to discharge the HV Capacitor (I left mine unplugged for like 45 minutes as well since I was a bit nervous, and then touched the 2 terminals on the capacitor). Unfortunately, I still could not get to where I needed to go...the magnetron.



    Next, I removed the fan housing...a few screws...wiggle out. Behind it finally, was a huge transformer and the 'magical' magnetron. My next hurdle was to unscrew the magnetron.



    Well, this was harder than I thought. There's only 4 screws on top holding it on, but to get to the screws, I had to remove the outside housing (easy, just look for the screws along it's side). I thought I could get to it by removing the panel where one of the fuse was connected to (which was above the control panel on the inside) but that was fruitless. It only gave me a peak into the area, but no access. I had to remove the housing.



    Finally, I was able to unscrew the magnetron...Finished? NO! Because the transformer was below the magnetron, I did not have enough clearance to get that damn magnetron out because of it's antennae. Next, I had to remove more screws so that I could lower the transformer. A few in the front, back, and sides. This allowed me to loosen the flooring that was bolted to the transformer, and finally, I got the magnetron out. I did this because I could not reach the 4 screws that were holding the transformer in it's place.



    In any case, I know I must have done at least 10 things wrong, and probably did everything the long way, but at least I figured it out. Hopefully, someone can take this post and learn from it.



    If anyone has any ideas about getting my warrantied magnetron, please let me know ASAP! My microwave is all over my kitchen table.



    BTW, if you would like to see any pictures of the gutted beast, let me know. I will have it open until I figured where and how to get my magnetron (hopefully for free) ...at least a day or 2.



    Thanks

  • sclieu May 11, 2010

    Regarding the bad solder connections, would this be an obvious visual inspection for any disconnected/loose wires? If none, then replacing the magnetron would be the next bet?



    Any ideas of how difficult to do either? I found a web site for the magnetron part, and it was around $130. Is this reasonable?



    Thanks!

  • Anonymous Mar 14, 2014

    GE spacesaver microwave reset

  • acmservice May 01, 2017

    No It is not. Look for a place called global micro parts they are in Texas and have great prices on much better, after market parts. youll get the same junk part from GE. I have never had a mag from GMP fail. Been doing this for 30 years

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GE Microwave ovens, and Microwave Ovens produced by GE but released under different brand names, have had several power problems for the past 20 years. Because it is so easy to sell parts and charge outrageous rates for repair GE never corrected the problems. They just continued it in the next model. They found that you would most likely purchase a new unit rather than paying $75. for a service charge, and $150. for labor plus parts (if out of warranty period).
Most failures were cold solder connections on the power relay board. These would come completely dis-connected after arcing and burning away the solder. Could be 1 month, could be years, but they knew it would happen. This power relay board feeds 120volts to the LV (low voltage) side of the HV (high voltage) Transformer. No High Voltage,,No cook. Everything seems to run normal, but if you listen carefully you will not hear the low tone from the HV Transformer. Over my thirty years in the business I have re-soldered rather than replace so many I couldn't count.
Next to that, a defective Magnetron.

Posted on Jan 25, 2008

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  • Totalwreck Jan 26, 2008

    The Power Relay Board is a printed circuit board of medium size. You can find it by following the two wires on the LV side of the HV Power Transformer back to the board.

    To test: connect a Volt-Ohm Meter to the LV side of the HV Transformer (this will be the same two wires to the board). Set your Meter above 120Volt AC setting. Put a load inside the MW Oven say a cup of water. Plug Mw in and turn on. The meter should read 120 Volts if the board connections are good. If no Voltage, connections on board are open. Can sometimes be seen as burned on solder side of board. Clean connections and re-solder solid. If you have 120Volts at the LV side of the HV Transformer---Then you have a High Voltage Side Problem. Mag, Hv Diode, Capacitor.

    Good Luck

  • Totalwreck Feb 02, 2008

    To sclieu. The Magnetron should have a reading of 1ohm between the two terminals. This is reading the filiament. If you get no reading between the two terminals, ..Then your filiament is OPEN. NO Filiament = No Output.

    There should be NO continuity (ohms) between the Magnetron case (frame, Ground) and the Magnetron Terminals. Continuity = SHORT.

    You stated (in your latest post)" I took an ohmeter and tested the Magnetron by touching it's 2 connectors. The result is no resistance (expected)". The Magnetron SHOULD HAVE A 1ohm READING between the 2 terminals. This is the Filiament.

    Now that the Magnetron has been removed Re-Test it with your Ohmeter.

  • Totalwreck Feb 02, 2008

    To sclieu. If you get no resistance reading between the 2 Magnetron terminals, then the Filiament is OPEN. There should be a 1ohm reading between the terminals. OPEN Filiament = NO OUTPUT. Open Filiament. Replace Magnetron!!

    Re-Test your Magnetron with the Ohmmeter. To be sure.



    There should be NO resistance, or infinity, between Magnetron terminals and the Magnetron case (frame, ground). Any Resistance Reading would indicate SHORT.

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G.E. uses what I have called the worst Magnatron available. The number on the bottom is OM75P The unit will run normally and the mag generally doesnt short, so you get no loud pronounced hum, it just doesnt heat. The whole unit must come down off the wall and be completely disassembeled to replace the mag. For the cost of the mag and labor, unless you think you can do it yourself. I would suggest replacing the unit. New ones have come down so much in cost. And get whole new warranty too. If the mag is bad prob need new diode too.

Posted on May 01, 2017

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Update: I ordered a magetron from someone with an ebay store for about $43 with shipping already included (was a part from a display model but with moneyback guarantee). I installed it and microwave works! Thanks, Totalwreck for saving me hundreds of dollars!

Posted on Feb 17, 2008

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94% of the problems with ALL microwaves is the magnatron. i guarantee it!!!!

Posted on Jan 06, 2008

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