GE Dishwasher Error Code F1

F1 on a GE dishwasher means the main control (MC) board has detected a communication failure with the user interface (UI) board. These two boards must exchange signals for the dishwasher to accept your input and run cycles. When communication is lost, the machine stops and displays F1. The fault is usually in the wiring harness between the two boards, though either board can also be the source.

No. When F1 is active, the MC board and UI board are not communicating, which means the dishwasher cannot reliably receive or execute commands. Running the machine in this state risks an incomplete or uncontrolled cycle. Stop using the dishwasher until the communication fault is diagnosed and resolved.

A power reset can clear F1 if the error was caused by a temporary communication glitch rather than a hardware fault. Turn off the dishwasher at the circuit breaker or unplug it for 60 seconds, then restore power. If F1 comes back immediately or after the next cycle attempt, the underlying cause is a physical problem with the harness or one of the boards, and a reset alone will not resolve it.

Start by disconnecting power to the dishwasher for one minute, then restore power to see if the error clears. If F1 returns, access the UI board and MC board and inspect the wiring harness that connects them. Reseat all connectors firmly and check for any bent pins, corrosion, or damaged wires. If the harness looks intact and connections are secure but F1 persists, one of the two boards is likely defective and will need to be replaced.

If the fix is simply reseating a loose harness connector, there is no parts cost. A replacement wiring harness typically runs $20 to $60 in parts. A new UI board generally costs $80 to $200, and a main control board can range from $100 to $300, depending on the model. If you hire a technician, expect to add $100 to $150 in labor. Checking and reseating connections yourself first is a reasonable first step before spending money on parts.