The Frigidaire 242036308 Refrigerator Mullion Flipper Service Assembly is a replacement component used to support proper door sealing and compartment separation in compatible refrigerators. Positioned along the door edge, this assembly operates as a movable flap that shifts into place when the doors close, helping create a proper seal between sections. It works by aligning with the opposite door and cabinet frame to reduce unwanted air transfer and support stable internal cooling conditions. Installed within the refrigerator door structure using the designated mounting area, it functions as part of the door system. This component assists in maintaining consistent temperature control and supports proper refrigerator operation during regular use.