Frigidaire Refrigerator Error Code SY CE

The SY CE error code on a Frigidaire refrigerator indicates a communication failure between the main control board and the user interface (UI) board. This fault is specifically triggered following a Power On Reset (POR) event, meaning the control system attempted to re-establish communication between the two boards after power was restored or interrupted, and the handshake failed. The main board and UI board exchange data continuously to coordinate display output, user input, and operational commands. When this communication link breaks down, the refrigerator cannot function normally and displays SY CE to alert the technician.

The communication path between the main board and UI board runs through a wiring harness with key connection points at connector J6 and connector J9A. These connectors are the first physical points to inspect. Loose, corroded, or damaged pins at either connector can interrupt the data signal entirely. The wiring harness itself may also have chafed insulation, broken conductors, or connector housings that have backed out of their seats, all of which disrupt the communication signal without being immediately obvious.

If the wiring and connectors check out as intact and properly seated, the fault likely resides in one of the two boards themselves. Either the main control board has failed to initialize its communication output after the POR event, or the UI board is not responding to the signals being sent. In some cases, a power surge or voltage irregularity during the reset event can damage communication circuitry on either board. Replacing the faulty board is the corrective action when wiring is confirmed good.