The Frigidaire 241872513 Door Gasket creates a tight seal around the refrigerator door to retain cold air and maintain consistent internal temperatures. This replacement gasket fits around the door frame and presses against the cabinet when the door closes, limiting warm-air entry and reducing cold-air loss. A proper seal supports stable cooling conditions and can reduce moisture or frost caused by air leakage. A cracked, loose, or worn gasket may allow cold air to escape and make temperature control less consistent.