Hey guys I have a Panasonic microwave with an inverter that isn't heating. The microwave runs for about 20 seconds, stops, and displays an error code. I followed the service manual steps to check the inverter and seem to have come to the conclusion that the inverter was ok. However, I wasn't convinced so I unplugged the high voltage wires from the magnetron and jumped them with a very thin strand of wire from a multistranded cable. Immediately after starting the microwave it vaporized the wire. This is a repeatable result so it seems the inverter is in fact good.
This would suggest that the fault is in the magnetron. However, the filament in the magnetron tests good at 0.2 ohms so it seems strange to me that it would be causing the problem.
Just wondering if anyone here knows anything about microwave repair and could let me know if replacing the magnetron is the right call or of there is something else that could be the problem.
Thanks