Question about GE Spacemaker JVM1640SJ Microwave Oven

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Microwave stopped working

Microwave simply stopped working (as though all power was cutoff, light and all). Plugged into different outlet with no effect. Could this just be a blow power fuse?

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  • freddy2907 Dec 16, 2007

    Just stopped as well no lights no clock. Checked breakers and no luck. Could this be a defective product?

  • kje72 Dec 17, 2007

    replaced the ceramic fuse near the power intake, but unfortunately that didn't seem to solve the problem. Some other portion of the power circuit must have failed but it's difficult to test unfortunately.

  • dcj1 Feb 25, 2008

    My GE Spacemaker XL (Model JVM1460) just had the same thing happen. No indication of power. Circuit breaker OK.  The Solution listed by Bob from LI sounds like it might do the trick, only problem is I don't quite understand where I might find the fuse inside the unit or how to change it.

  • dcj1 Feb 25, 2008

    Same problem - no power indication - unit was on and working (heating a cup of water) - heard a "click" type sound and everything went off.  Checked circuit breaker - ok. Can't really check plug without completely dismounting the unit (plug is behind unit).  Solution listed by Bob from LI sounds like the right thing but don't quite understand how to find or replace the internal fuse.

    Any suggestions? 

  • mushadojosom Jan 09, 2009

    microwave stopped working this is the third one in 6months. the 1st micro we had for 3yrs then it blew, bought a new one pluged died in a week, had outlet check and voltage output is fine returned for a replacement had 3rd one 6months now this one is dead too. is it something were doing wrong?



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Generally, you get something unless the fuse inside is blown. There is generally a fuse inside the unit when you remove the button package. First, make sure that the outlet you have is good. Plug something else into it and see that it works.

Posted on Dec 17, 2007

  • Robert Hirst Dec 17, 2007

    kj...most of these units have thermo cutoffs. They are about the diameter of a dime, black and 3/8 inch thick with two wires coming out of them. Unplug the wires..and test them where you find them. Polarity is not important. At least one will be attached to the wall outside the power chamber near the power supply. Quick test: unplug unit...check for continuity...if you don't have an ohm meter, disconnect the leads, connect them with a paper clip, tape them up and apply power. Replace as needed. Many of these units also have pigtail fuses on the circuit board. Check them. too.


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Hi I cannot solve the problem , but I seem to have a different problem. The lights are on the clock works everything seems to function except it will not heat. Please help.

Posted on Mar 02, 2010


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1 Answer

MY microwave just stop working all of a sudden what can I do

-Have you try to plug it to different outlet to see possibly the outlet has no power. Or try different circuit to plug into the one the microwave plug in to see it work or not. If no work then there is not power at that outlet. The breaker is pop.
But if it works then you possibly need new microwave.

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>> We also tried plugging our toaster into the microwave plug outlet, and the toaster wouldn't work in that outlet, but worked just fine in a different outlet in the RV.

This means the outlet you plug your microwave into needs to be fixed in addition to fixing the oven. Breaker? Fuse?

>> I understand from another RV forum that microwave ovens for RVs have "special circuitry and cooling features" not found in regular countertop ovens for household use.

Not really in my experience. Any microwave supplied with clean AC power and proper venting space will be fine.

But I'd bet your microwave can be fixed affordably.

The main internal things which can result in this model being dead (no display, no light when you open the door, no beep when you press a pad on the keypad) would be the 20A fuse and the magnetron temperature fuse. There could also be bad connections on the noise filter board.

Also, sometimes a power surge can cause the power to be interrupted to the low voltage transformer on the board, and I regularly repair those boards. I can also write a technical statement to your insurance company or to an RV park as needed.

At my Web site, I have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.

The relevant service manuals for this model are here and here.

You can order Sharp parts from Sears or Encompass.

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Possibly the fuse / breaker is tripped, usually all outlets in one room share same breaker. Check breakers (or fuses) or try outlet in differnt room. If the outlet has power, (plugin a lamp to check) and the microwave still does not work, take it back to store for replacement or refund.

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There are replacable fuses inside. Taking the microwave apart requires removal of a lot of screws and the cover that can be rather bulky. make sure it's unplugged and safe before you begin. you can get replacement fuses at radio shack, ect. be sure to buy the same type and amperage. if the blow a second time there may be other issues.

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1 Answer

Microwave power shut off and stopped working

You can test safety thermostats with an ohmmeter. There should be a short circuit between the device's two terminals if it's closed. (This doesn't necessarily mean the device is good, though. It might be opening at too low a temperature when the oven is operating.) A high resistance or an open circuit means the thermostat has opened and needs to be replaced. An appliance parts store should have suitable replacements, or you can order from a number of online vendors. I usually start at the Sears parts site. They have part information for many models, and usually pretty fair prices for parts. But once you have the part number you need, a Google search will let you shop around.

It does sound like your oven shut down because of a thermostat. One is normally mounted on the magnetron tube that supplies the microwaves, and another is on the cooking cavity. I've had to replace these many times. If the main power fuse blows the oven will not come back on until it's replaced. But you might also have bad solder connections causing the trouble as well. I've seen solder joints on the control board and power filter board cause dead ovens.

If you're not absolutely sure of what you're doing working on a microwave, you might want to let a professional check it over and make an estimate. There are potentially lethal voltages present, and microwave leakage may be a concern as well.

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Maybe a short in the plug somewhere?

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This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

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