Customer Questions and Answers for Internal-Bias Thermostat (Dryer) by Whirlpool

This internal-bias thermostat regulates dryer drum temperature by cycling the heat on and off, helping maintain consistent drying performance and protect against overheating.

• Controls the cycling temperature of the heating circuit to prevent underheating or overheating
• Helps resolve symptoms like no heat, not enough heat, long dry times, or temperature swings
• A faulty thermostat may cause overheating that can trip the thermal fuse
• Located on the blower housing on many models

• Disconnect power and shut off gas (for gas dryers) before servicing
• Access the blower housing; note wire positions and transfer one at a time
• Mount the thermostat flush to the housing for proper sensing
• After installation, run a test cycle to verify proper heating