Whirlpool Washer Error Code SERIAL COMMUNICATION ERROR

This error means the Central Control Unit (CCU) and the Motor Control Unit (MCU) cannot exchange data correctly. The washer stops operation when this communication link fails to prevent motor damage. The problem can originate in the wire harness connecting the two boards, in the MCU itself, or in the CCU.

No, you should not continue running the washer while this error is active. The CCU cannot properly control the motor without reliable communication to the MCU, which creates a risk of unexpected motor behavior or damage to the control boards. Unplug the machine and diagnose the fault before resuming use.

If the fix is simply reseating a loose wire harness connector, there is no parts cost, only your time. Replacing an MCU typically runs in the range of $100 to $300 for the part, while a CCU replacement can cost $150 to $350 or more depending on the model. Adding a technician's labor charge will increase the total repair cost.

Yes, if you are comfortable working with appliances after disconnecting power. Start by unplugging the washer and inspecting the wire harness connections at the CCU, MCU, and motor for looseness or corrosion. Reseating connectors resolves the issue in many cases without any part replacement. If the wiring is intact, board replacement typically requires a technician.

A reset may temporarily clear the error code, but if the underlying cause is still present the error will return during the next cycle. Unplugging the washer for a few minutes and then restoring power is a valid first step, but the wiring and components still need to be inspected if the code comes back.