Customer Questions and Answers for Electronic Control Board (Central Control Unit) by Whirlpool

Hello Larry, The fault code you got is indicating a SERIAL COMMUNICATION ERROR. The communication between the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot be sent correctly. As per the tech sheet: Possible Causes/Procedure - Unplug washer or disconnect power. - Check that the power cord terminals are connected at the right position to the RFI filter (white-Neutral/ black-Line). - Make sure that the two ground switches are pressed correctly by the toe and rear panels. - Make sure that ground switches are installed correctly, are not broken, and that the green ground wires are connected correctly. - Make sure that both ground switches are not broken or scratched. - Make sure that all the ground harnesses (green wires) are connected correctly, and are not broken or with wires detached. - Make sure that all wire harness connections from the CCU (MI3 cavity), main Motor, and MCU are not broken or with wires detached, and that connector internal pins are visible. - Check for continuity from the MCU connector wires to CCU (MI3 cavity) connector. - If the continuity diagnosis failed, the Main Harness must be replaced. - Make sure that all the connectors are fully seated. - Check the drive system for any worn or failed components. - Plug in washer or reconnect power. - Verify the washer operation by running the Diagnostic Test cycle. See page 5. - After the diagnostic test has finished, unplug washer or disconnect power and wait for 15 seconds.