The Float Switch is an OEM replacement part specific to Bosch dishwashers. It is a switch located in the sump area of the dishwasher tub that detects water levels and provides feedback for automatic filling and draining functions. Symptoms of a bad float switch include: The dishwasher fails to fully drain water after cycles Cycles not initiating or advancing properly due to water level issues Float switch area where the sensor attaches developing leaks Loose or detached float switch from normal wear over time Causes of a bad float switch are usually mineral or sediment buildup disrupting its buoyancy and sensing ability. Without a properly functioning float switch, the dishwasher cannot effectively monitor water levels to manage filling and drainage. This OEM Bosch replacement switch is also compatible with Thermador, Gaggenau, and some Kenmore dishwasher models.This part fixes the following symptomsoverflowingWill not fill with waterPart Number 00165256 (AP2802373) replaces 165256, 935359, AH3439096, EA3439096, PS3439096, PS8697040.