GE Dishwasher Error Code SENSING_FLASH

The SENSING_FLASH error code on a GE dishwasher indicates a CleanSensor fault. The CleanSensor is an optical turbidity sensor that uses a light source and a receiver to measure how dirty the wash water is during certain cycles. During NORMAL and POTS & PANS cycles, the control expects the sensor's light to illuminate and transmit data about water clarity. When the sensing light fails to activate or the receiver does not detect it, the control board logs this fault and triggers the SENSING_FLASH indicator.

The CleanSensor assembly typically consists of an infrared LED emitter, a photodetector, and associated wiring that connects to the main control board. The fault can originate from a failed emitter that no longer produces light, a failed photodetector that cannot register the signal, a break or short in the wiring harness between the sensor and the control board, or a contaminated sensor lens that blocks the optical path entirely. Heavy grease or mineral scale buildup on the sensor lens is a common culprit, particularly in hard-water installations or when pre-rinsing is skipped.

Importantly, the dishwasher is designed to continue operating normally even when this code is active. The CleanSensor is a cycle-optimization feature, not a core wash function. Without it, the machine will run its cycles on fixed timing rather than adjusting based on water turbidity. GE's guidance is to call for service to have the sensor inspected or replaced, but the unit remains safe and functional in the interim.