Frigidaire Dishwasher Error Code iC1

The iC1 code indicates a MACS bus communication failure between the main control board and the display board. The main board sends identification requests to the display board during operation, and iC1 is logged when the display board does not respond correctly. This fault points to a problem with the wire harness connecting the two boards, the connector pins, or one of the boards themselves.

The iC1 fault indicates a loss of communication between control boards, which typically prevents the dishwasher from operating normally or completing cycles. Attempting to run the appliance in this condition is not recommended, as the main board may not be able to monitor or control cycle functions properly. The dishwasher should remain unused until the fault is diagnosed and resolved.

If the repair only requires reseating a loose connector, there is no parts cost and only the time involved. If the wire harness needs replacement, parts typically range from $20 to $60 depending on the model. A replacement display board or main control board generally costs between $80 and $200 per board, and professional labor to diagnose and replace components can add $100 to $200 or more to the total.

Checking and reseating the wire harness between the display board and main board is a straightforward task that many knowledgeable DIYers can perform safely with the dishwasher unplugged. If the harness and connectors appear undamaged and the error persists, diagnosing which board has failed and replacing it requires more experience with appliance electronics. If you are not comfortable working inside the dishwasher's control area, a technician should perform the repair.

A power reset by unplugging the dishwasher or switching off the circuit breaker for a few minutes may temporarily clear the iC1 code if the fault was caused by a transient communication glitch. However, if the underlying cause is a loose connector, damaged harness, or failed board, the code will return once the dishwasher powers back up and the main board again fails to receive identification data from the display board. A reset alone is not a fix.