Whirlpool Dryer Error Code F:45

F:45 indicates a motor control electronics speed sensor failure. The motor control board is not receiving a valid speed signal from the drive motor circuit. The dryer will typically stop operating when this fault is detected. Diagnosis should begin with TEST #3b to isolate the faulty component.

No, you should not continue using the dryer while F:45 is active. The control board cannot confirm the motor is running at the correct speed, which means it cannot properly regulate the appliance. Continuing to operate the dryer in this condition could cause further damage to the motor or control board.

A power reset may temporarily clear the F:45 code from the display, but if the underlying speed sensor circuit problem has not been resolved, the code will return once the dryer attempts to run. Resetting without diagnosing and repairing the fault is not a permanent solution and the dryer may fail again immediately or after a short period of operation.

A knowledgeable DIYer comfortable working with appliance wiring can begin by inspecting the wiring harness and connectors between the speed sensor and the motor control board. However, accurately diagnosing whether the fault is in the sensor, the wiring, or the control board requires following the specific TEST #3b diagnostic procedure. Replacing the motor control board or drive motor is a more involved repair that some DIYers may prefer to leave to a technician.

Repair costs depend on which component has failed. A wiring repair may be relatively inexpensive, while a replacement motor control board typically costs anywhere from $80 to $200 or more for the part alone. A full drive motor replacement can range from $100 to $300 or higher for the part. Adding labor costs from a technician will increase the total depending on your area.