The Door Interlock Switch Assembly is an OEM part for GE dishwashers. It is designed to ensure the dishwasher door is securely closed before the wash cycle begins, preventing leaks and ensuring the appliance operates safely. Causes of a bad interlock switch can include wear and tear from frequent use, electrical issues, or physical damage to the switch or its housing. A malfunctioning switch can prevent the dishwasher from starting or cause it to stop mid-cycle. Symptoms of a bad door interlock switch assembly include: Dishwasher not starting Interruption of wash cycles Door not latching securely Error codes related to door latch issues This GE replacement part is also compatible with Hotpoint, RCA, and some Kenmore models.This part fixes the following symptomsWon't startPart Number WD21X10169 (AP3203787) replaces 1063709, AH783632, EA783632, PS783632, WD21X10121.