Answer Hi Christina. I would use a volt/ohm meter part # MA-DM1 to assist. you in your diagnosis. There is a thermistor part # WP35001191 on the blower housing cover. It should read 10,000 ohms at room temperature of 77°. If not within 5% then change it. There is a safety fuses to the left of it. Make sure it is closed at 0 ohms. Not open or infinity. This will stop the heat. Check the thermostats on the side of the heater assy. part # WPW10222771. All fuses need to be at o-ohms, closed. They will open in a over heat or a shorted circuit or wire. Make sure the heater ohms out between 10-18 ohms and is not shorted to the casing. Ohm one side terminal to the casing at a time to make sure. Read More... Answered by AppliancePartsPros.com | Thursday, April 12, 2012