GE Dishwasher Error Code AcF

AcF means the dishwasher's control board has detected supply voltage greater than 170 volts, which it flags as a critical high-voltage fault. The dishwasher shuts down to protect its internal components, including the control board and motor, from damage. The issue is almost always in the home's electrical supply rather than inside the dishwasher itself.

Start by measuring the supply voltage at the outlet or junction box feeding the dishwasher using a multimeter. It should read approximately 120V AC for a standard residential installation. If voltage is significantly elevated, contact your utility provider to report a possible transformer issue, or have a licensed electrician inspect your electrical panel and circuit wiring. If supply voltage is normal and the code returns after resetting the dishwasher, the control board's voltage sensing circuit may be faulty and the board will need replacement.

You can reset the dishwasher by cutting power at the circuit breaker for one minute and restoring it, but if the underlying supply voltage condition still exists, the AcF code will return immediately or during the next cycle. A reset is useful for confirming whether the fault was caused by a temporary voltage spike, such as a brief utility fluctuation, versus an ongoing electrical problem that requires diagnosis and repair.

No. The AcF code is a critical fault and the dishwasher will not run while it is active. Even if you could bypass it, running the appliance under high supply voltage conditions risks permanently damaging the control board, heating element, and motor, and creates a potential electrical hazard. Do not attempt to use the dishwasher until the supply voltage has been confirmed normal and the code is cleared.

If the cause is a utility overvoltage event, there may be no cost to you beyond the service call. If a licensed electrician needs to correct a wiring fault in your panel or circuit, expect to pay roughly 150 to 400 dollars depending on the scope of work. If the dishwasher's control board has failed and needs replacement, the part typically costs 100 to 250 dollars, with labor adding another 100 to 200 dollars if a technician performs the repair.