Don for Model Number JVM3670SF001 My microwave has stopped heating at around the same time that the front panel started showing a message that it was time to replace the charcoal filter. I did not associate the two events, but now I am wondering if the microwave has some sort of circuit that cuts the power to the magnetron in the case that the charcoal filter is not replaced. I am also wondering how it even knows that it is time to replace this filter. I opened the microwave and tested several components. I checked three of the thermal switch sensors, and they seem to work. I also checked the fuses. I did not check the magnetron, high voltage capacitor, or the high voltage diode.
Answer Don, The charcoal filter needing to be replaced would have nothing to do with the unit not heating. The unit not heating will most likely be a bad magnetron or the thermostat on the magnetron. Read More... Answered by AppliancePartsPros.com | Tuesday, March 10, 2015