Whirlpool Replacement Defrost Heater for Refrigerator is compatible with Whirlpool, Kenmore, Maytag, KitchenAid, Amana, Jenn-Air. This refrigerator defrost heater melts away the ice that has accumulated on the evaporator fins. Part Number WP12729128 (AP6005557) replaces 12729128, PS11738607, B00LPDKSOE, B0056LCCCM.