Fisher & Paykel Dishwasher Error Code A1

The A1 code indicates a water supply fault, meaning the dishwasher did not receive adequate water during its fill cycle. The control board monitors the fill process and stops the cycle when it cannot confirm that enough water has entered the tub. This can be caused by external supply issues or internal component faults. Start by checking that the water tap is fully open and the supply hose is unobstructed.

The dishwasher will not operate a wash cycle while the A1 fault is active, so there is no immediate safety risk from the fault itself. You should not attempt to override or bypass the fault. Address the underlying supply issue before running the machine again to avoid any potential for the control board to command components to operate without water present.

If the fix is simply opening a tap or straightening a kinked hose, there is no cost involved. Cleaning the inlet valve filter screen is also a no-cost repair in most cases. If the water inlet valve itself needs replacement, parts and labor typically range from $150 to $350 depending on your location and the service provider. A faulty pressure sensor repair would fall in a similar cost range.

Begin by confirming the water supply tap is fully open and the supply hose is not kinked or crushed behind the machine. Next, disconnect the hose from the inlet valve and check the small filter screen at the connection point for sediment blockage, cleaning it if necessary. If supply and hose are both fine, the water inlet valve or pressure sensor may need to be tested and replaced by a technician.

Resetting the dishwasher may temporarily clear the displayed code, but the A1 fault will return at the next fill attempt if the underlying cause has not been resolved. A reset is useful to confirm whether the fault was a one-time anomaly, such as a tap that was briefly turned off, but it is not a fix. Correct the water supply issue first, then reset the machine and run a cycle to confirm the fault does not return.