Question about GE JVM1540SMSS Microwave Oven
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Posted on Jan 02, 2017
A microwave can be dead
for many reasons.
It may be the fuse, which is usually located behind the grille or on the floor of the oven behind the control panel or between the door switches.
If the fuse is good, it may be an open thermostat or thermal cutout (TCO) / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.
If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open.
Then when it cools, it closes the circuit and allows power through again.
When checking TCOs or thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.
If the cavity thermostat needs to be checked or replaced you'll need to pull the oven from the wall, in which case you can download GE owner's manuals and installation instructions here.
If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.
If it goes dead or blows the 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 should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.
If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.
There should be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
You can usually find helpful exploded view diagrams by entering your full model number here. Once you have the part numbers, though, I would suggest ordering parts here at a much lower cost.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Dec 17, 2008
check the circuit breaker first it may be the fuse is blown The fuse may be located behind the grille following the power cord on the rside of the unit.
it may be a bad thermal fuse or oven thermostat.
Posted on Dec 24, 2008
SOURCE: My GE microwave JVM1860 is
One of the most common problems with Ewave microwaves is a loose blade on the cooling fan, causing the magnetron to overheat.
At this time looks like the magnetron, the magnetron TCO and the fan blade have to be replaced.
Posted on Aug 29, 2009
Check the fuse in the bottom of the oven ... near where the power cord enters.
Posted on Oct 19, 2009
Testimonial: "Fixed it. There is a fuse in the front top right corner. Three screws and one 250V 20 Amp fuse later, Works.. Wife called repair center wanted $47 "
SOURCE: GE Sensor Microwave JES1855 died
Mine went dead after about 6 months. I had problems with my breakers and I found out that it was the microwave that blew all of them. I also found out that this perticular microwave is a fire hazard and should be recalled. It has caused me alot of headache. The breakers in my house are brand new and they are put out by GE also. It caused me to loose the food in my freezer, I did not know my freezer had lost power. It would cause my entire lights to go off and then they would come back on. I have checked around and I found out that the power cord on the back of the unit is very loose. I had a person to come in and look at it, he thinks its the power cord.
Posted on Jan 17, 2010
Tips for a great answer:
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Dead appliance, power on wall outlet.
SAFETY IS PARAMOUNT!
this only if you are competent.
your appliance has absolutely no functions at all, remove it from the
mains supply, remove the case and see where the mains lead goes in to
the appliance and follow the cable until you find the main fuse.
ONLY USE THE SAME TYPE AND RATING OF FUSE TO REPLACE IT.
The usual cause of this fuse failure is the door switches are contaminated or sticking. Check the door switches before putting power back on to the appliance.
Hope this helps.
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