GE Dishwasher Error Code F8

F8 on a GE dishwasher means the turbidity sensor is reporting a high reading, indicating it is detecting an abnormal level of cloudiness in the wash water. This could be caused by a failed sensor, a wiring harness issue, or physical contamination on the sensor itself. The dishwasher may interrupt or modify its wash cycle when this fault is active.

An F8 error does not indicate a water leak or electrical hazard, so it is not a safety emergency. However, running the dishwasher with a faulty turbidity sensor means the control board cannot accurately monitor wash water conditions, which can result in poor cleaning performance or incomplete cycle execution. It is best to diagnose and repair the issue before continued use.

If the fix is simply cleaning the sensor lens or reseating a loose harness connector, the repair costs very little beyond your time. If the turbidity sensor itself needs replacement, parts typically range from around $20 to $60 depending on the model, with additional labor costs if a technician performs the repair. Total professional repair costs for this type of fault generally fall in the range of $100 to $200.

Start by inspecting the turbidity sensor wiring harness for loose connectors, corrosion, or damaged wires. Also check the sensor lens in the sump area for grease or debris buildup and clean it if necessary. If the harness and sensor appear physically intact and clean, replacing the turbidity sensor is the recommended next step to resolve the fault.

A reset may temporarily clear the F8 code from the display, but if the underlying problem with the turbidity sensor or its wiring has not been addressed, the error will return during the next wash cycle. A reset is useful for confirming whether the fault is intermittent, but it is not a substitute for diagnosing and repairing the root cause.