Question about GE Spacemaker JVM1640SJ Microwave Oven

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GE spacemaker microwave blows fuse and shuts off when start button is pressed

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  • 9,047 Answers

Probably a shorted high voltage diode.

Here is a link 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)


There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.

Also at our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
You can find links to helpful exploded view diagrams and part ordering help here.

I recommend that you bookmark that link to your favorites. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on May 05, 2010

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1 Answer

GE Spacemaker microwave makes groaning sound when start button is pressed for a second or two then blows the internal fuse. After replacing the fuse everything seemed to work, lights, exhaust fan, cl


Could be a lot of things but most probably a shorted high voltage diode assembly. If not that then the magaetron or capactors. Remember be careful there are high voltages even when the oven is unpluged. The capactors are usually charged and must be discharged. If you don't know what yor doing then time to get a qualfied tech.

Good luck

Feb 14, 2014 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

GE spacemaker XL microwave oven blowing fuse


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead several seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If it goes dead or blows the house fuse or breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

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

Here's a YouTube video available showing how to remove a typical over the range control panel assembly in under 5 minutes.


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

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1 Answer

My ge profile spacemaker II microwave went dark, no lights of any kind and no sound or response when pressing any button. tried resetting the circuit breaker but no change


Did you check the internal fuse? Often when everything is dark the fuse that protects the microwave is blown. Take the old fuse to your local hardware store and they will have a replacement for you. Should cost less than $5.

Nov 30, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

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GE Spacemaker Microwave JVM1441 BH04 tripping circuit breaker


your power transformer for the magnetron could have a shorted primary power winding,the door safety interlock switch could be mis-adjusted,this normally blows the internal unit fuse,a shorted high voltage capacitor,or diode,a bare wire inside the unit,more than the microwave on that circuit or a weak circuit breaker in the house power panel

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Microwave runs for split second then shuts down blowing fuses in the kitchen. GE Spacemaker XL 1800.


Hi .. your problem is most likeliy inside the microwave itself. I would replace it. Or you can take it to a shop that does repairs to get a diagnoses and estimate .. but replacement might be the less costly.

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Paper caught fire in microwave. microwave power


check breaker in your home electrical panel...make sure all are on

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1 Answer

My GE jvm230 blows fuse when the start key is pressed. Refused and all is well until start key is pressed again and the fuse blows. I think my HV cap. is shorted. The HV capaciator isreading less than 1...


It might be the cap but it is probably a bad diode. The diode if shorted to the cabinet will of course blow the fugging fuse every time. The diode should have continuity in one direction only. If the 2 leads between the mag are shorted to chassis the fuse will also blow. You have 3 suspects the diode the cap and the mag. I would replace the cheapest thing first and that would be the diode and i am correct a shitload of times. Peace brother.

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1 Answer

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replace the fuse. You have to remove the top grill and then you will find it above the display

Dec 24, 2007 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Microwave stopped working


Sounds like it blew the fuse, and when the fuse blows immediately upon hitting the START button, I'd say you have a shorted high voltage capacitor. But it may also be an open thermal cutout on or near the magnetron or just a fuse. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your actual model number (like JVM1860B01, not XL1800 or Spacemaker) here: http://tinyurl.com/gv383

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