The Whirlpool 2159057 Door Seal Gasket for Refrigerator helps maintain an airtight seal to support efficient cooling and food preservation. This replacement door gasket is designed for compatible refrigerators and fits around the edge of the door to create a secure barrier when the door is closed. It works by preventing warm air from entering the refrigerator compartment and minimizing the escape of cold air, helping the appliance maintain consistent internal temperatures. Replacing a worn, cracked, or damaged gasket can improve energy efficiency, reduce strain on the cooling system, and help keep stored food fresher for longer periods.