Customer Questions and Answers for Thermostat (Bimetal) by Whirlpool

This thermostat is a temperature-sensitive safety switch that monitors heat and opens or closes the circuit at a set point. Replacing a failed thermostat restores reliable temperature protection and corrects issues caused by tripping or stuck contacts.

• Monitors component/cavity temperature and trips at a preset limit
• Opens (or closes) the electrical circuit to prevent overheating or activate cooling functions
• Common symptoms: no heat or intermittent heating, unit won't start or shuts off during use, cooling/vent fan runs constantly or never turns on
• Useful diagnostic clue: faulty thermostats may test open or stuck closed at room temperature

• Disconnect power at the breaker before servicing; if used in a microwave, be aware the high-voltage capacitor can retain a dangerous charge
• Note wire locations; transfer one lead at a time and secure the thermostat in the original mounting position for proper sensing
• Ensure clean metal-to-metal contact with the mounting surface; do not overtighten screws
• After installation, restore power and verify normal operation