Ge WB20X10048 Thermostat OEM Part

GE Microwave/Convection Oven. Removed case (carefully). Tested in-line power cord fuse with multi-meter. Fuse was good. Noticed a scorch mark on a wire connected to the oven cavity thermal fuse. The fuse appeared to have been overheated from too much movement in it's mount. Removed part from unit and used number on the part to order a new one. Installed new part, re-assembled, and unit works fine.

With no power in the unit I started to investigate. I removed the power cord and checked the supply. Then I removed a few panels from the unit. The parts are readily accessible and the wiring diagrams on the computer are very helpful. I removed the wires from each device and the probed the devices. I ordered the parts from Appliance Parts Pros online and they shipped the parts in less than one day!

Checked all of the external power sources - all good. Had to be a fuse. Main fuse was fine, tested the thermal fuses with multimeter and found this one was bad. Part was 2-3 weeks out locally, APP had it. Ordered 8:00pm Friday and it was here Saturday afternoon. Amazing! Put it in and it works. Saved a $100 service call(plusparts and the return call) or an $800 microwave replacement. Thanks for the quick response!

Replaced it, this forum helped me diagnose the problem

Replaced Oven Cavity Thermal Couple (open) and replaced fuse. Fuse was not open, but replaced as it had been stressed.