A thermal fuse is a safety device designed to prevent dryers from overheating. It is a one-time-use fuse that will blow if the dryer gets too hot, cutting off power to the appliance. Thermal fuses are typically located near the heating element of the dryer.
It is important to check the thermal fuse if your dryer is not heating properly. A blown thermal fuse will need to be replaced in order for the dryer to work again. Checking the thermal fuse is a relatively simple process that can be done in a few minutes.