Fisher & Paykel Dishwasher Error Code U2

The U2 code indicates a tub open fault. The dishwasher's control system has detected that the drawer is open during a wash cycle, or it has received an open-circuit signal from the drawer microswitch or the exhaust valve. The machine halts operation until the fault is resolved to prevent running a cycle with an unsecured tub.

A reset may clear the code temporarily, but if the underlying fault is a failed microswitch or exhaust valve, the error will return as soon as the next cycle begins. A reset is only a lasting fix if the cause was simply an open or unlatched drawer during the previous cycle.

If the fix is simply closing the drawer, there is no cost. A replacement drawer microswitch typically costs in the range of $20 to $60 for the part, while an exhaust valve replacement may range from $40 to $100 or more depending on the model. Adding a technician's labor for diagnosis and installation can bring the total repair cost to anywhere from $100 to $250 or higher.

Start by checking that the drawer is fully closed and latched, then restart the cycle. If the error returns with the drawer confirmed shut, enter diagnostic mode to test the microswitch. If the switch fails the diagnostic test, it will need to be replaced. If the switch tests fine, inspect the exhaust valve and associated wiring for open-circuit conditions.

The U2 fault causes the dishwasher to halt the cycle, so the machine will not operate normally while the code is active. Do not attempt to bypass the fault, as the code exists to prevent the machine from running with an unsecured drawer or a compromised exhaust valve. Resolve the underlying fault before running another cycle.