Chosen Solution
fan goes on without starting it
Microwave Automatic Fan Feature. All over-the-range microwaves have an automatic fan as a safety feature. This fan automatically turns on if the unit is overheating. … The thermostat resets itself and the fan shuts off when the surface area cools to approximately 150 degrees F or less. also Press the microwave’s “Control Setup” or “Options” button so the microwave display enters setup mode.Scroll to the “Vent Fan” sub-menu and press “Enter/Start.“Select “Off,” then press “Enter/Start” a second time to turn the vent fan off.