Fisher & Paykel Washer Error Code 28

Error code 28 on a Fisher & Paykel washer indicates a Phase 1 communication or sequencing fault between the Display Module and the Motor Control Module. Specifically, these two control boards are operating out of sequence with one another, meaning the handshake or synchronization protocol that coordinates their operation has broken down. Fisher & Paykel washers rely on precise timing and communication between these modules to manage wash cycles, motor speed, and user interface commands. When this coordination fails, the machine triggers code 28 to flag the breakdown.

The root cause is most often electrical in nature, involving wiring harness integrity, connector condition, or a fault within one of the two modules themselves. Because the diagnostic procedure for code 28 directly references the fault code 17 procedure, the underlying failure mechanism is closely related. Code 17 typically involves similar inter-module communication failures, so the same inspection pathway applies: checking connectors, wiring continuity, and module functionality.

Technicians should begin by thoroughly inspecting all wiring and connectors between the Display Module and the Motor Control Module, looking for corrosion, loose pins, or damaged insulation. If the wiring checks out, the modules themselves must be evaluated individually. In some cases a power reset will temporarily clear the fault, but if the underlying cause is a failing module or compromised wiring connection, the error will return during the next cycle.