Whirlpool Refrigerator Air Diffuser (W11645127)

The Whirlpool Refrigerator Air Diffuser controls how cold air moves from the freezer into the fresh food section. It opens and closes to balance temperatures between compartments and to prevent the refrigerator side from getting too cold or too warm. When it operates normally, it helps keep airflow steady so shelves and drawers cool evenly. Common causes of failure include a stuck or broken internal door, a worn drive mechanism, or a failed diffuser motor or control. Ice buildup, condensation, or debris can also block the diffuser and restrict airflow. Over time, normal wear can cause the diffuser to stick open or closed, which can lead to unstable temperatures in the refrigerator section. Use these symptoms to help decide if this air diffuser matches your problem: Refrigerator section is too warm while the freezer stays cold Refrigerator section is freezing food or forming ice in bins and on shelves Weak or no airflow from the diffuser vent into the fresh food section Temperature swings in the refrigerator section despite normal settings Unusual clicking, buzzing, or humming near the air vent area Frost or ice buildup around the diffuser vent or nearby ducting