The Primary and Secondary Door Switch is an OEM replacement part for GE microwaves. This part interrupts the power supply to the microwave when the door is opened.    Causes of bad door switches can include regular wear and tear, electrical malfunctions, or physical damage from slamming the door.   Symptoms of a bad Primary and Secondary Door Switch include: The microwave not starting or operating intermittently The appliance operating with the door open The interior light not turning on or off appropriately This OEM GE part is also compatible with Hotpoint, RCA, and some Kenmore models.WB24X823 (AP2024331) replaces 253813, AH237415, EA237415, PS237415, WB24X0820, WB24X0823, WB24X820.