Dishwasher shows U3; often appears when the wrong program is selected or when the machine is overloaded.

Safety first: Open the door slowly to avoid hot steam.

• 1. Check loading: Ensure dishes are loaded according to the Haier manual. Avoid stacking items so tightly that water cannot circulate.
• 2. Verify spray arm clearance: Spin the spray arms by hand to confirm they rotate freely without hitting dishes.
• 3. Choose appropriate program: For heavily soiled loads, select an intensive or heavy cycle rather than an eco or quick wash.
• 4. Reset program: Cancel the current cycle, close the door, and select a new program. See if U3 reappears.
• 5. UI check: If U3 appears even with correct loading and program, inspect the user interface board and buttons for sticking or misoperation.

Warning: Overloading can damage racks and spray arms over time.