Question about GE Spacemaker JVM1640SJ Microwave Oven

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The fuse was blown, I replaced the fuse and the display came back. I tried to heat something to see if it was fixed and it dimmed the whole house before blowing the fuse again. Is it TOAST?

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Sorry to read about your problem.

It seems your have a general failure in the power control or switch failure on the unit. if your unit has power, and things lite. it is more likely you have a control/switch problem, you did not give a model number, so i cant tell you if a service call will be worth it.

Microwaves must be serviced by technicians due to the inherent dangers involved in repairing these appliances. Internal capacitors can retain a lethal electrical charge even though the unit is completely unplugged. A microwave radiation leakage test must be performed on the unit following any internal component repair.


I tried to help you. Please help me and Rate/Vote on my response, thanks and good luck

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Posted on Jan 02, 2011

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1 Answer

My microwave runs and sonds normal but doesnt heat anyhing


First: Check the high voltage fuse (this fuse connects between the
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Second: If this fuse blown again, the magnetron must be replaced
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HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron, near the blower housing.)))

Nov 02, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

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Fuses Usually, when your microwave oven doesn't work it all, the internal fuse (thermal fuse) is blown. This fuse protects both you and the oven. When it blows, you need to have a qualified appliance repair technician replace it.

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Everything works on the microwave but wont heat food.


You need to remove the cover, (Power Unplugged!!) look for and check a long glass fuse (usually in a plastic housing)
It's 5000 volt and less then one amp rating.
It's a small wire inside fuse so check it with a meter.
If it's ok, it's most likely the Magnetron which is usually half the price of the machine.
If the fuse has blown, see if there is a black diode, 30-40 mm long, one end is screwed to the case.
Disconnect one end, If you have continuity both directions, it's failed causing the fuse to blow.
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1 Answer

No heat, does not cook


Q - The microwave makes a loud "hum or buzz" noise but will not heat up the food?
A - 9 times out of 10 this is usually this is a bad magnetron, the other time is sometimes a bad high voltage diode. See components section.
 
 
Q - My microwave is running and sounds like it is working but will not heat up anything.
A - Many thing can do this but, common things are....loose high voltage wire.....poor solder joint on board.....magnetron.....power relay.....
 
Q - The microwave display counts down and the inside light is on,  but nothing is heating and the fan is not running.
A - This most commonly is a bad door switch, other possible problems are a faulty relay or solder joint on the power module, but a bad door switch is most common.
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A - This often is a stuck or faulty door switch and it has blown the interior microwave fuse.
 
 
Q - My microwave is completely dead.
A - House fuse has blown or interior fuse inside the microwave has blown ( usually a part inside the microwave makes this fuse blow ) Sometimes a bad fuse holder inside the microwave cannot hold the fuse tight enough and the fuse will blow as well. 
 
 
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A - YES, the fan cools the magnetron and electronics, take the microwave in for service, most fans are not too expensive to replace.
 
 
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1 Answer

No light, internal fan...then no display


The light isn't a safety issue but I would think that the fan would be.

The fan is designed to remove excess heat from unit and keep it cool. Without the fan, you're now operating the unit under conditions that it wasn't designed for.

With the unit unplugged, try removing the cover and see if a fuse has blown. If so, replace it with the EXACT value of the original.

See if the unit powers up again. Try heating heating up something for 30 seconds to see if the Magnetron is still functioning.

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Don't operate it further until you have it looked at. You don't want to cause something else to fail.

Good luck!

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