Fisher & Paykel Dishwasher Error Code Err

The Err code indicates an inter-wash controller communications fault, meaning the top tub wash controller has lost communication with the bottom tub wash controller. This is specific to Fisher & Paykel dual-tub dishwasher models that use two separate control boards to manage each tub. The appliance will not run until the communication link is restored. The fault is most often caused by a wiring issue rather than a failed board.

No, you should not attempt to run the dishwasher while this fault is active. The appliance has detected a failure in the control communication between its two tubs and has halted operation for that reason. Running a dishwasher with a failed controller communication link could result in uncontrolled or incomplete cycle behavior.

If the issue is simply a disconnected harness, the repair may cost nothing beyond a service call fee, which typically ranges from $75 to $150. Harness replacement parts vary but generally fall in the $30 to $80 range before labor. A replacement wash controller board is more expensive, with parts and labor costs often ranging from $200 to $400 or more depending on the specific board required and your location.

If the cause is a disconnected harness connector, a confident DIYer can reseat the plug after unplugging the appliance from power. Visually inspect the wiring harness running to the bottom tub controller for obvious damage or a loose connection. If the harness is damaged or the connectors look corroded, or if reseating the plug does not clear the fault, a technician with the ability to test continuity and evaluate control boards will be needed.

A power reset, such as unplugging the unit or cycling the breaker, may temporarily clear the displayed code, but the fault will return if the underlying wiring or controller problem is not fixed. The Err code is triggered by an active communication failure, so the root cause must be resolved before the appliance will operate normally.