That shows triac semiconductor is working fine, the problem is the magnetron, "heats food" cracked high voltage diode or a shorted high voltage capacitor.
SOURCE: microwave
Generally, the most common causes of a failure to heat are: - bad door switches or door switch mounts If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383
- loose connection at the magnetron
- problem or loose conneciton on the control unit circuit board
- bad magnetron or other high voltage part
SOURCE: GE JVM1870SF02 - not heating up anything!!
check high voltage section , check wiring of magnetron.
SOURCE: Microwave not heating food and is making loud noise.
You have burned out the magnatron (heating element) which is common on GE microwaves. most service companies will charge about 200-250 to replace it
SOURCE: My GE Profile Microwave/Convection Oven stopped working.
Chances are that the thermostat / thermal cutout / T.C.O. (whichever it uses) has opened.
This can happen when the magnetron overheats, either due to it's failing, or if the internal cooling fan is not working.
It may also that be the 15- or 20A ceramic line fuse or the oven cavity thermostat / thermal cutout / T.C.O. (whichever it uses) has opened.
There
should also 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.
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
helpful exploded view diagrams and order parts by entering your full
model number from the tag on the oven here.
You should be able to
get the fuse from a home center or local appliance parts store.
Accessing some components for testing and possible replacement will require you to remove the oven from the wall.
If
so, the installation instructions are very handy, and it's best to have
two people since the microwave can be heavy and awkward.
You can download GE
owner's manuals and installation instructions here.
We're
happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
SOURCE: GE microwave stopped heating food. adjusting
If you can enter any time or power level on the micro touch pad, and the micro starts and counts down and stops, then your electronic control board (panel) is ok. The problem is in the heating energy components such as magnatron, transformer, capacitor, and diode; these components being very hi voltage and you must know what you are doing (must release the stored energy) so you do not get shocked (even if unplugged). Most often it is the diode or capacitor and it is worth repairing. Goodluck, macgivor..
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