Whirlpool Washer Error Code 318

Error code 318 means the compressor motor inverter board has reported a fault. The inverter board controls the compressor and blower motor, and this code appears when the board detects an internal problem or is not receiving proper voltage. The washer will stop normal operation until the fault is resolved. Diagnostics should start with checking the line voltage at connector CN8 on the inverter board.

No, you should not continue using the washer while error code 318 is active. The fault indicates the compressor motor inverter board is not functioning correctly, and operating the machine in this condition could cause further damage to the inverter board or related components. Disconnect the washer from power until the issue has been properly diagnosed and repaired.

A reset may temporarily clear the error code display, but it will not fix the underlying fault with the inverter board or power supply. If the root cause is not corrected, the code will return once the washer attempts to operate again. A proper repair requires diagnosing the voltage at CN8 and addressing whatever component or wiring issue is causing the inverter board fault.

Some causes of error code 318, such as a tripped breaker, a loose connector at CN8, or low wall outlet voltage, can be addressed without replacing parts. However, if the inverter board itself has failed, replacing it requires working near high-voltage AC components, which carries a serious safety risk. Technicians with electrical experience can perform the voltage checks at CN8, but board replacement is best handled by a qualified repair professional.

Repair costs vary depending on the root cause. If the issue is simply a loose connector or a wiring problem, the cost may be limited to a service call fee, typically in the range of $75 to $150. If the inverter board itself needs to be replaced, parts and labor combined can range from $200 to $450 or more depending on your location and the specific model.