The Whirlpool WP3404153 is a replacement thermostat for Whirlpool dryers. A thermostat is an essential component of your dryer that regulates temperature by sensing the inside air. This works like a switch, automatically turning on and off the heating element to keep the appropriate drying temperature. When the dryer reaches the desired temperature, the thermostat trips, turning off the heater to avoid overheating. A broken thermostat can cause a dryer to overheat or stop heating altogether. Replacing a faulty thermostat with the Whirlpool WP3404153 Dryer Thermostat Fix can restore your dryer's regular operation and ensure that your clothes dry properly. In addition to optimum heating, a working thermostat keeps your dryer from overheating, which can cause a fire.