Fisher & Paykel Dishwasher Error Code U6

The U6 code means the dishwasher has detected that the spray arm may have come loose from the motor rotor, or that the appliance failed to fill with water within the 175-second timeout period. Both conditions prevent the wash cycle from completing. The code is the control system's way of alerting you to a mechanical or water supply problem that needs attention before the next cycle can run.

You should not attempt to run a wash cycle while the U6 error is active. If the spray arm is dislodged, water will not be distributed correctly and dishes will not be cleaned. If the fill timeout has triggered, the dishwasher may not have enough water to operate safely. Resolve the underlying cause before starting another cycle.

If the cause is simply a dislodged spray arm or a closed supply valve, there is no parts cost involved. If the water inlet valve needs to be replaced, parts typically range from $30 to $80 depending on the model, with additional labor costs if a technician is needed. If the motor rotor or spray arm components are damaged and require replacement, costs will vary based on part availability and the extent of the damage.

Start by opening the dishwasher and checking that the spray arm is firmly seated on the motor rotor and that the rotor is correctly installed in its housing. If the spray arm assembly looks correct, check that the water supply valve under the sink is fully open and that the inlet hose is not kinked. If those steps do not resolve the error, inspect the inlet valve filter screen for blockage or consider testing the inlet valve itself for proper operation.

A reset may temporarily clear the error code, but if the underlying problem has not been fixed, the U6 code will return when the dishwasher attempts to fill or run a cycle again. Resetting without addressing the spray arm seating or the water supply issue is not a lasting solution. Always inspect and correct the root cause first.