This “Dispenser Door Assembly” (Door Recess Assembly, Ice Door Assembly, Dispenser Door, Refrigerator Dispenser Ice Chute Door Kit, Dispenser Door Flap, Ice Chute Door, Flapper) keeps the room air from infiltrating the freezer. Once the lever is pressed, the door flap opens and allows the ice to dispense into your container. If your door flapper is broken, it could allow outside air to enter the freezer and alter the inside temperature. You may notice frost buildup surrounding the dispenser area. The door flap can disconnect from the dispenser lever, or the tabs that hold it in place may break. Frequent use may distort the sealing face and cause air leaks and frost buildup.