The Door Switch is an OEM part for Frigidaire microwaves. It plays a crucial role in the microwave's overall function by detecting when the door is open or closed. The door switch communicates this information to the control board, enabling it to safely operate the microwave's electronic components and magnetron when the door is shut. Symptoms of a bad door switch include: The microwave failing to operate or function properly with the door closed   Inability to start or pause operation when the door is opened Error codes or failure messages appearing on the display related to door functionality Causes of a bad door switch can be wear and tear over time, damage from repeated opening and closing of the microwave door, or impact from accidental mishandling.  This OEM replacement is also compatible with Electrolux, Admiral, Crosley, White-Westinghouse, and Kenmore models.5304509460 (AP6230615) replaces 5304464099, 5304520020, 4583656, PS12071303.