Continental Washer Error Code COM

The COM error code means the main microprocessor control board and the inverter drive board have lost communication with each other. The inverter will simultaneously display Er8 as a companion fault code. The communication link depends on a dedicated cable and a 5 VDC signal from the microprocessor. Without it, the washer cannot control the motor and will stop operating.

No. When the COM error is active, the washer cannot properly communicate between its control board and motor drive system, which means motor speed and direction cannot be reliably regulated. Operating the machine in this condition risks further damage to the inverter or control board. The washer should remain out of service until the fault is diagnosed and corrected.

A power reset may temporarily clear the COM error code from the display, but if the underlying fault with the communication cable, connector, microprocessor, or inverter board still exists, the error will return as soon as the washer attempts to operate. A reset alone is not a repair. The 5 VDC signal at connector X-14 and the condition of the communication cable must be verified to permanently resolve the fault.

Some causes of the COM error, such as a loose communication cable, can be addressed without special tools by inspecting and reseating the connector at microprocessor position X-14 and at the inverter board. However, diagnosing whether the microprocessor or inverter board has failed requires a multimeter and comfort working around live electrical circuits. If you are not experienced with appliance electrical diagnostics, a qualified technician should perform the voltage testing and any board replacement.

Repair costs vary depending on the failed component. Replacing the communication cable is typically the least expensive fix, generally in the range of a service call fee plus a low-cost part. Replacing the microprocessor control board or the inverter board is more involved, with parts and labor costs typically ranging from $150 to $400 or more depending on parts availability and local labor rates. Getting a firm diagnosis before ordering parts will prevent unnecessary expense.