Continental Washer Error Code A-04

The A-04 code indicates a failure of inverter relay K-2, meaning the inverter is not receiving confirmation that this relay has closed on the microprocessor board. The control system halts operation when it cannot verify the relay state. The first place to check is the wiring connections at the CM and X2 terminals on the inverter, using the red wire on CM and the black wire on X2 as reference points.

Resetting the washer may temporarily clear the A-04 code, but if the underlying fault is still present, the code will return once the machine attempts to operate again. A reset is not a fix. The root cause, whether a poor connection, failed relay, or faulty board, must be identified and corrected for the washer to operate normally.

Repair costs vary depending on the failed component. If the fix is simply reseating or cleaning the connections at CM and X2, costs may be limited to a service call fee, typically in the range of $75 to $150. Replacing relay K-2, the inverter, or the microprocessor board will add parts costs, and total repair costs for component replacement can range from $150 to $500 or more depending on parts availability and labor rates in your area.

A homeowner with basic electrical knowledge can start by inspecting and reseating the connections at the CM and X2 terminals on the inverter, checking for loose, corroded, or dirty contacts. If cleaning and securing the connections does not resolve the code, diagnosing a failed relay, inverter, or microprocessor board requires component-level testing and is best handled by a qualified appliance technician.

The washer will typically stop operation when A-04 is active, which is a protective measure to prevent running the motor drive system in an uncontrolled state. You should not attempt to force the machine to run while this fault is present. Leave the washer unpowered until the fault has been diagnosed and repaired.