Frederick Exhaust Fan runs whether door open or closed when 1st plugged in. GE Profile Microwave Oven PVM1870DM3BB replaced Magnetron, Diode, Capacitor, all 3 door switches, Thermal Switch. The microwave heats and shuts off normally but Exhaust fan constantly runs and the fan symbol on the display is indicating it is on. When I disconnect the microwave and then plug the power cord into the A/C socket, the display comes on and then the exhaust fan comes on low and stays on all the time whether I heat up something or not. I set the clock to a time and then microwave shows time in display. Next, I put a cup of water to heat for 30 seconds and it counts down to 0 then beeps and shuts the magnetron off but fan ALWAYS stays on. I went into OPTIONS and selected normal and one other time slowest fan speed but the exhaust fan continues to run. I do not know where the exhaust thermostat is. I replaced a thermal Switch which was on the lower right vertical frame just to the right of the fan that cools the large transformer. I have no readable schematic of the parts and now at my wits' end. Thank you
Answer Hello Frederick, This is most likely a stuck relay on the control board WB27X11068 but could also be caused by a bad control panel WB07X11119. Read More... Answered by AppliancePartsPros.com | Tuesday, July 30, 2019