Fisher & Paykel Washer Error Code #50

Error code #50 on a Fisher & Paykel washer indicates a fault detected in the hot and/or cold water inlet valve circuit. The water inlet valves are electrically operated solenoid valves that open and close to allow water into the drum during fill cycles. The control board monitors these valves through their wiring harnesses, and when it detects an unexpected electrical condition, such as an open circuit or a wiring connection problem, it flags this error and halts the wash cycle to prevent incorrect water levels or uncontrolled filling.

The most common trigger for this code is a harness connection issue. If the wiring connector to the hot or cold valve solenoid is loose, disconnected, or incorrectly seated, the control board reads no continuity through that circuit and registers the fault. An open circuit within the valve solenoid itself is another direct cause, meaning the solenoid coil has failed internally and no longer allows current to flow through it.

Diagnosing this code correctly requires starting at the harness connections as described in the first diagnostic step. Each valve harness should be inspected for secure seating, corrosion at the terminals, or physical damage to the wiring. If the harnesses are intact and properly connected, the next step is to test the solenoid coils of the hot and cold valves for continuity using a multimeter. A solenoid measuring infinite resistance indicates an open circuit and confirms valve failure requiring replacement.