Dacor Dishwasher Error Code F-8

F-8 indicates a communication failure between the main control board in the door and the relay board in the base of the dishwasher. The two boards communicate over a 4-wire low voltage connector carrying Ground, 5 VDC, Data, and Neutral signals. When that data transfer is interrupted or fails, the dishwasher stops and displays F-8. Moisture on the connector is the most common cause.

A reset may temporarily clear the F-8 code, but if the underlying cause such as moisture or a damaged connector is not addressed, the error will return. Resetting the dishwasher without inspecting the 4-wire connector is not a lasting fix. Always resolve the root cause before relying on a reset.

If moisture is the cause and the connector only needs to be dried and reseated, repair costs may be limited to a diagnostic service call, typically in the range of $75 to $150. If a relay board or control board needs to be replaced, total repair costs including parts and labor can range from $200 to $500 or more depending on parts pricing and local labor rates.

Start by locating the 4-wire low voltage connector that runs between the control board in the door and the relay board in the base. Disconnect it, inspect it for moisture, corrosion, or loose pins, and allow it to dry completely before reconnecting. If the connector looks clean and is fully seated but the error returns, the relay board or control board may need to be replaced.

No, the dishwasher should not be operated while F-8 is active. The error means the control board and relay board cannot communicate, which means the appliance cannot properly manage its wash cycle functions. Attempting to run cycles in this condition could cause incomplete operation or additional faults.