Question about GE JVM1870 Microwave Oven
Was just starting to heat something when oven made a hummimg noise & went dead. Checked breaker & power at outlet which is good. Opened unit & found a blown 20A fuse. Replaced fuse & restored power to oven. Lights & fan work. Tried heating something in oven & the same humming sound occurred and fuse blew again. A diagnostic sheet found within oven says to check varistor, but I don't know what it looks like! Also, what are magn TCO & oven cutout? They're next on the troubleshooting flow chart.
sounds to me like the magnatron has shorted out. i don't know of a way to test them unless you have some high dollar equipment. a continuity test prob wont tell you anything. what reading did you get on the cap when you tested it?
Posted on Jan 06, 2008
SOURCE: JVM239WV001 Stopped working.
It could be a flame sensor, which is a thermal switch located inside the cabinet on top of the cavity (there may be two of them). One power lead should go to the fuse, the other would go to the flame sensor. Remove the flame sensor and check for continuity. If it shows open (infinite resistance), put it in the coldest part of your freezer for a few minutes, then retest. If it now reads continuity (zero resistance), replace it, put the appliance back together, and see if it works.
Posted on Jan 23, 2009
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