The GE Spacemaker microwave oven includes an exhaust fan that automatically operates when temperatures within the appliance exceed approximately 150 degrees Fahrenheit. The GE Spacemaker microwave operates with a built-in thermostat that communicates electronically with the exhaust fan.
The automatic exhaust fan feature helps to prevent the appliance from overheating and protects the electrical components of the GE Spacemaker from overuse or damage. Once the microwave oven's temperature falls below 150 degrees Fahrenheit, the automatic exhaust fan shuts off and the thermostat resets itself.
Automatic exhaust fans are a common safety feature in all GE appliances and over-the-range vent hoods and microwaves.