Whirlpool Washer Error Code 42

Error code 42 on a Whirlpool washer means the drive motor inverter board has detected and reported a fault. The inverter board controls motor speed and direction, so this fault will prevent normal agitation and spin operation. Diagnosing the code requires running service mode test 11, the Spin Test, to full completion to determine whether the fault is in the inverter board, the drive motor, or the wiring between them.

You should not attempt to run a wash cycle when error code 42 is active. The inverter fault means the motor control system has detected an abnormal condition and stopped operation to protect the motor and other components from further damage. Continuing to force cycles could worsen the fault or create a safety risk.

A power reset may temporarily clear the error code display, but it will not resolve the underlying fault. Error code 42 is generated by the inverter board detecting a real fault condition, so the code will return as soon as the washer attempts to run the motor again. A proper diagnosis using service mode test 11 is needed to identify and correct the root cause before the washer will operate reliably.

Some causes of error code 42 can be addressed without professional help, such as reseating a loose connector or clearing debris from around the inverter board. However, confirming the fault source requires running the service mode Spin Test and checking motor winding resistance, which requires technical knowledge and a multimeter. If the inverter board or drive motor needs replacement, a qualified technician is recommended to ensure correct installation and safe handling of high-voltage components.

Repair costs depend on which component has failed. A wiring harness inspection and connector repair is typically the least expensive fix, often covered mostly by labor costs. Replacing a drive motor inverter board generally runs in the range of $150 to $350 including parts and labor, while a drive motor replacement can push total costs to $200 to $450 or more depending on the model and labor rates in your area.