The Latch Hook is an OEM replacement part for Frigidaire microwaves. It is an internal component that helps securely latch and lock the microwave door during operation. The latch hook works with the door handle mechanism to ensure the door is properly fastened to prevent leaks of microwave energy and for safety.  Causes of a bad latch hook can include wear and tear over time, damage from repeated use of the door latch, or issues with the latch hook spring or connecting components.  Symptoms of a bad latch hook include: The microwave door not closing or latching securely   Difficulty closing or popping open the door during a cycle Leaks of microwave energy from around the door seals Error codes related to door-latching problems This OEM Frigidaire replacement part is also compatible with Electrolux, Westinghouse, and Kelvinator microwaves.5304509457 (AP6230612) replaces 5304464096, 5304499580, 4583653, PS12071300.