The Whirlpool WPW10424991 Refrigerator Thermostat is a key component that ensures your refrigerator's temperature remains consistent and ideal. It serves as the brain for your refrigerator's cooling system. By monitoring interior temperature, The compressor's energy flow is controlled by the thermostat.. When the desired temperature is attained, the thermostat signals the compressor to turn off, preventing the refrigerator from overcooling. If the temperature rises, the thermostat reactivates the compressor and starts the cooling cycle again. T. Replacing a defective thermostat with the original WPW10424991 part ensures compatibility and restores normal temperature control in your Whirlpool refrigerator, preventing rotting and ensuring the safety of your groceries.