The Diffuser is an OEM part for Whirlpool refrigerators. It is a part responsible for evenly distributing the air flow within the refrigerator compartment, ensuring consistent and efficient cooling throughout the interior. Causes of a bad Diffuser can include blockages or obstructions that restrict air flow, physical damage or cracks that compromise the diffuser's ability to distribute air properly, or simply wear and tear over time. Symptoms of a bad Diffuser include: Uneven cooling, with some areas being warmer than others  Frost buildup or condensation in certain sections of the refrigerator  Increased energy consumption as the compressor works harder to maintain desired temperatures  Potential food spoilage due to inconsistent cooling This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper and some Kenmore models.W10814173 (AP5985775) replaces W10251495, W10699909, 4273188, PS11723079, W10354976, W10750145, W10869523, W10914207.