The Interlock Switch is an OEM replacement part for GE electric and gas dryers. This safety component monitors the door closure, preventing operation if the door is not securely closed and latched. The switch measures 2 inches long and 1/2 inch wide. Symptoms of a faulty interlock switch include: Dryer failing to start or running with the door open   Timer display not illuminated when start button is pressed   Inability to open the dryer door during operation Dryer suddenly stopping mid-cycle before fully drying clothes Causes relate to the internal component contacting the door frame over 50,000 open/close cycles potentially exposing wiring to wear. Regular cleaning the external switch area prevents dust or lint buildup skewing performance.  This genuine GE switch is compatible with Hotpoint and RCA dryers as well. Note: Can be used as a dishwasher door switch on specific models. Check your model number for the most accurate results.This part fixes the following symptomsWon't startPart Number WD21X10261 (AP3994765) replaces 1263984, AH1481922, EA1481922, PS1481922, WD21X0557, WD21X557.