Robert Hughes for Model Number PVM1790SR1SS Unit works 100%. However, just today the 2011-mfg product will hum loudly when the door is closed. Turned off breaker for 1min+ and unit showed a cold restart. Closing the door again made the unit hum. Fan (both vent and internal units) sounds good, turntable works (note: turntable has been non-smooth in rotation with some small binding sounds). All buttons work properly. All timings and apparently power levels work properly. Do you have any ideas? I am an old heavy ground radar technician and IT consultant so I know my way around such machines, however, the 60Hz hum almost sounds like power leaking (transformer primary on? but Maggie would start up wouldn't it?).
Answer Robert, If you are getting a humming when the door is closed then this will most likely be caused by a faulty door switch. This would be what would need to be tested and replaced if faulty. Read More... Answered by AppliancePartsPros.com | Tuesday, April 14, 2020