Fisher & Paykel Washer Error Code 73

Error code 73 on a Fisher & Paykel washer indicates a pressure transducer error, specifically that an incorrect pressure transducer has been detected as fitted to the machine. The pressure transducer is the sensor responsible for measuring water level inside the wash tub by converting water pressure into an electrical signal that the control system reads. When the Motor Control Module receives a signal from the pressure transducer that falls outside the expected parameters for the machine's configuration, it flags this mismatch as error code 73.

This error differs from a simple sensor failure or wiring fault. The root cause is typically a component incompatibility, meaning the pressure transducer installed in the machine does not match the specifications the Motor Control Module expects for that particular model. This can occur after a previous repair where an incorrect replacement part was fitted, or in cases where a control module has been substituted without ensuring full compatibility with the existing sensor.

Because the Motor Control Module is the component interpreting the transducer's output and making the determination that the signal is incorrect, Fisher & Paykel's diagnostic procedure directs technicians to replace the Motor Control Module as the first step. This approach addresses the possibility that the module itself is misidentifying a correctly fitted transducer due to an internal fault or incorrect firmware configuration stored within that module.