The Whirlpool WPW10463858 is a replacement compressor made exclusively for Whirlpool, Maytag, Kenmore, and Amana refrigerators. The cooling system in your refrigerator runs on a compressor. Refrigerant is circulated within a sealed system to accomplish this. Heat from the interior of your refrigerator is absorbed by the refrigerant, which then releases it as a gas outside. This gas is compressed by the compressor, raising its pressure and temperature. The hot, high-pressure gas then flows through coils on the outside of your refrigerator, releasing heat into the surrounding air. After cooling down, the refrigerant flows back into the refrigerator to resume the cycle by absorbing more heat. A properly operating WPW10463858 compressor is critical to keeping your food fresh and your refrigerator chilled.