Whirlpool Dishwasher Error Code FC

The FC code indicates that the ASA (Automatic Softener Assembly) electronics have detected high electrical resistance in the water softener's resin bed. This points to a fault in the softener system, its sensors, or the wiring connecting them to the control board. Importantly, this code only appears during an active diagnostic test program and will not display during a regular wash cycle. A technician must enter the diagnostic mode to reproduce and address the fault.

Because the FC code only appears during diagnostic mode and not during standard operation, your dishwasher will generally still run wash cycles. However, if the water softener is not functioning correctly, your dishes may not be cleaned as effectively, and hard water deposits could build up over time inside the appliance. It is advisable to diagnose and resolve the fault promptly to protect the machine's long-term performance.

Repair costs vary depending on the root cause. If the fix is simply reseating connectors or clearing a salt bridge, there may be little to no parts cost, though a service call can run between $75 and $150. Replacing the ASA electronics module or a damaged wiring harness typically adds parts costs ranging from $50 to $200 or more, depending on parts availability. Getting a diagnostic visit from a technician first will help determine the most cost-effective path forward.

Some causes of the FC code are DIY-friendly, such as checking and reseating cable connectors on the water softener, breaking up a salt bridge in the softener reservoir, or topping off the salt level. However, testing wiring continuity and resistance at the ASA module and WHS electronics connectors requires a multimeter and comfort working with appliance wiring. Replacing the ASA electronics module is best handled by a qualified technician.

A power reset will typically clear any displayed fault code temporarily, but it will not resolve the underlying hardware issue causing the FC fault. Since this code is only triggered during the active test program, it will reappear the next time diagnostics are run if the wiring fault or component defect has not been repaired. A proper fix requires physically inspecting and testing the softener cables and electronics.