Fisher & Paykel Washer Dishwasher Oven Error Code 51

Error code 51 on Fisher & Paykel appliances indicates a diverter fault. The diverter is a valve or actuator mechanism responsible for directing water flow between different pathways within the appliance. In washers, this typically means routing water to the drum or drain. In dishwashers, the diverter directs wash water between spray arms at different levels. When the control board detects that the diverter is not responding correctly, not reaching its intended position, or drawing unexpected current, it triggers error code 51 to alert the user and halt operation.

The most common causes of this fault involve the diverter motor or actuator failing to move to the commanded position within the expected time frame. This can occur due to a seized or broken diverter valve, a failed diverter motor, or wiring harness issues such as open circuits or shorts between the control board and the diverter assembly. Food debris, scale buildup, or foreign objects can also mechanically obstruct the diverter, preventing it from rotating or sliding to the correct position.

Diagnosing this fault requires inspecting the diverter assembly for physical obstructions or damage, checking the wiring harness for continuity and secure connections, and testing the diverter motor for correct resistance and operation. If the motor tests out of specification or the valve housing is cracked or seized, replacement of the diverter assembly is typically required. In some cases, the control board itself may be sending incorrect signals, though this is a less common cause compared to a failed mechanical or electrical component in the diverter circuit.