The Refrigerator Door Gasket is an OEM replacement part for Whirlpool refrigerators. This black gasket ccreates a seal around the door perimeter, helping maintain proper cooling and humidity levels inside the fridge. Causes of a bad door gasket can include cracks, compression set, or decomposition of the sealing material over repeated use and exposure. Age and general wear also contribute to deterioration.  Symptoms of a bad door gasket include:  Cool air leaking noticeably around the door seal  The door not closing flush or tightly against the cabinet Fogging or frost developing inside near the door   Warm spots felt along the gasket perimeter This OEM Whirlpool part is compatible with other brands including Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, and some Kenmore refrigerators.2159081 (AP3037181) replaces 2171192, 2181891, 2196237, 2221311, 2309653, 443024, PS323904, W10912379.