This step-by-step dryer repair guide shows how to replace a dryer thermistor. The thermistor, which is usually attached to the blower housing, measures the temperature inside the dryer. If the thermistor fails completely and stops sensing the temperature, the control panel usually displays an error code, and the dryer stops. If you suspect that the dryer thermistor isn't accurately sensing the temperature, you can check it with a volt/ohm meter. Consult the tech sheet that came with your dryer for information about thermistor testing and, if the thermistor is the problem, replace it with a manufacturer-approved dryer part.
This repair procedure works for Kenmore and Whirlpool dryers with the vent screen housing located at the bottom of the door opening. The basic repair procedure also works for similar dryers such as Maytag, Amana and GE dryers with removable service panels on the front of the dryer.