Fisher & Paykel Dishwasher Error Code F8

F8 indicates a RAM fault in the dishwasher's electronic controller. The controller's onboard memory has failed or is not functioning correctly, causing the unit to stop operating. This is an internal board-level fault and not related to sensors, water supply, or drain components.

A hard reset by disconnecting power for several minutes is worth attempting before ordering parts, but it is unlikely to resolve a true RAM fault. If the memory circuits on the controller have physically failed, the F8 code will return as soon as the unit powers back up and runs its self-diagnostic routine.

The cost depends on whether you use a technician or replace the controller yourself. Electronic controller parts typically range from $150 to $350 depending on the specific model. Professional repair, including parts and labor, generally falls in the range of $250 to $500. On older units, comparing repair cost against replacement value is advisable.

The corrective action for F8 is replacement of the electronic controller. A knowledgeable DIYer comfortable working with appliance electronics can perform this replacement by sourcing the correct controller for their model and following proper safety precautions. However, because the fault is internal to the board, there are no simpler component swaps that will resolve it.

When the F8 fault is active, the dishwasher will not complete a normal cycle because the controller cannot operate reliably. Attempting to run the unit in this state is not recommended, as unpredictable behavior from a faulty controller could interfere with water fill and drain timing.