How Dryer Thermal Fuses Work

The dryer thermal fuse shown above is connected in series with the dryer motor electrical circuit. If there is a condition that causes excessive heat such as a vent restriction or a defective control thermostat / thermistor the thermal fuse will open and interrupt the motor circuit causing the dryer to shut down. The one shown is a one time fuse and must be replaced before the motor will start up again. If this fuse is bad the motor will NOT hum. If you find the thermal fuse open you must address the condition that causes the excessive heat. Another name for the thermal fuse is a safety fuse or safety thermostat. Click here for information on dryer vent restrictions.

You can see in the illustration to the left where the dryer thermal fuse # 6 is located on an older Maytag dryer.