The Whirlpool WPW10530058 Refrigerator Thermostat is a critical component that controls the temperature inside your Whirlpool refrigerator. It functions as a sentry, continuously checking the temperature inside and informing the compressor when it needs to switch on or off. This keeps your food fresh and prevents spoilage caused by incorrect storage conditions. The thermostat starts the compressor to cool the refrigerator when the interior temperature increases above the predetermined level. The compressor circulates refrigerant, taking in warmth from the refrigeration compartment. This heated refrigerant goes through coils on the outside of the fridge. where it is released into the air that surrounds it.