Whirlpool Dryer Error Code F-42

F-42 indicates that the motor control board has detected a line voltage below 90 VAC, which is classified as an undervoltage failure. The dryer shuts down when this condition is detected to protect the motor from operating on insufficient power. The problem is most often traced to the home's electrical supply, such as a tripped breaker or a loose wiring connection, rather than a failed dryer component.

No, you should not attempt to continue running the dryer when F-42 is active. Undervoltage conditions can cause the motor to overheat and draw excessive current, leading to component damage or a potential fire hazard. Disconnect the dryer from power and resolve the voltage issue before resuming use.

Repair costs vary widely depending on the root cause. If the fix is simply resetting a breaker or tightening a terminal connection, there may be no parts cost at all, though a service call fee of roughly 75 to 150 dollars may apply. A replacement power cord typically runs 20 to 60 dollars in parts. If the motor control board needs to be replaced, parts and labor combined can range from 150 to 350 dollars or more depending on your location and service provider.

Some causes of F-42 are DIY-friendly, such as resetting a tripped breaker or tightening a loose power cord connection at the terminal block. However, any work inside the dryer's terminal block or at the electrical panel involves potentially lethal voltages and should only be performed by someone comfortable working with 240 VAC circuits. If voltage measurements confirm the supply is healthy but the code persists, replacing the motor control board typically requires a qualified technician.

Resetting the dryer by unplugging it or cycling the breaker may temporarily clear the code, but it will return immediately if the underlying undervoltage condition has not been corrected. A reset alone is not a fix. The line voltage supply must be inspected and brought back within acceptable range before the dryer will operate normally.