I have a problem with GE JVM1790.
The MV unit fan now runs all the time and never turns off unless you open the door.
(I am not referring to the vent fans).
The unit will heat fine, but the fan that cools the MV power unit runs non-stop unless I unlpug the unit.
Is there a RESET sequence for the onboard PC or is this some other "zip-zap" circuit board glitch ??
SOURCE: New microwave; loud fan when heating items
Update: I took it back. After speaking to GE, they said that's just how it is, there is no way to silence or quiet it. I took it back and bought an LG. I love it!
SOURCE: GE Advantium SCA1000.
I fixed this yesterday, using the solution posted here: http://forum.appliancepartspros.com/microwave-repair/4882-advantium-turntable-light-always-main-relay.html
Unplug the unit.
Replace the interior light using these instructions: http://www.instructables.com/id/GE-Advantium-Microwave-Halogen-Lightbulb-Replaceme/ The inside of my unit looks a bit different from the pictures, but the procedure is basically the same.
Additional info not in the procedure link above:
Remove the one screw at the top of the front control panel.
Slide the control panel up to disengage it, and pull out slowly (has wires on back)
There are four black rectangular things running top-to-bottom on the PCB board on the back. One of them is labeled RY1.
Tap on RY1 with a screwdriver a few times (very high tech). I actually tapped on all of them for good measure.
Reassemble, see if everything works now.
It took me about 30 minutes for the bulb and the control panel 'adjustment'. Everything is working now.
SOURCE: GE JVM1440WH01 Will not heat, everything else
It could be a number of things, Burnt connections between the magnetron, Capacitor, Diode and transformer, Heater connections loose or burnt, Transformer, Capacitor Diode or Magnetron US. You need to strip it and find out if you are getting about 2000volts to the Mag, Are you getting approx 5volts across the heater terminals?? NOTE that the 2000 Volts can remain in the cap indefinitely and the voltage is LETHAL. IT WILL KILL YOU if you don`t take precautions. Ian
SOURCE: I have a GE jvm1790 microwave that when its pluged
The megatron tube is not working. The microwave should turn off when the door is opened for safety. If it is still under warranty, return it. If not, you may consider replacing the unit. I know its expensive, but its just taking up cabinet space tonight.
SOURCE: Microwave GE Spacemaker JVM1650SH05 - The light
The bulb may have blown. It is often under an access panel on the side or back that is held on with a screw or two.
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I too have this same issue. This van will not turn off unless the door is left ajar.
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