Fisher & Paykel Washer Error Code 58

Error code 58 on a Fisher & Paykel washer indicates a pressure transducer maximum adjustment fault. Specifically, the Display Module performs a memory check at startup and detects that the pressure transducer count is greater than expected. The pressure transducer is responsible for measuring water level inside the drum by converting water pressure into an electrical signal that the control system interprets. When the stored count in memory exceeds the acceptable threshold, the system flags this as a fault and halts normal operation.

This fault is rooted in the communication and calibration relationship between the pressure transducer and the Motor Controller Module. The Motor Controller stores and processes the transducer count values. If those stored values become corrupted, drift out of range, or reflect a hardware failure within the controller itself, the Display Module will detect the discrepancy during its startup memory check and trigger code 58. The fault does not necessarily mean the pressure transducer sensor itself has failed physically, but rather that the control system's interpretation or storage of its data is out of specification.

Because the diagnostic path points directly to the Motor Controller Module as the primary suspect, the issue is most commonly traced to internal memory or processing errors within that component rather than the transducer wiring or sensor body. Technicians should rule out loose connections at the pressure transducer and the controller before proceeding to component replacement, but the prescribed first step is replacement of the Motor Controller Module.