Error Code: DU Difficulty: Easy
Problem: Lid cannot unlock, possibly due to an obstruction on top of the appliance.
How to Fix DU Error (Step-by-Step)
- First, press the ‘Cancel’ button to terminate any running cycle, which may be keeping the door locked.
- Check the countertop above the dishwasher to ensure no items, like a cutting board or dish towel, are hanging over the edge and physically blocking the door from opening.
- Inspect the area around the dishwasher on the floor for any items, such as kitchen mats or fallen utensils, that could be obstructing the bottom of the door.
- Gently try to push the door fully closed to ensure it is properly latched, then try to pull the handle to open it again.
- If the door will not open, go to your home’s circuit breaker panel and turn off the power to the dishwasher.
- Leave the power off for at least 5 minutes to allow the dishwasher’s internal computer to reset.
- Turn the power back on and attempt to open the door. The reset should have released the locking mechanism.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
Amana Dishwasher Checks Before Replacing Parts
- Cut power at the breaker for at least one minute, then restore power and run a short cycle to see whether the same code or light pattern returns.
- Open the door and inspect the latch, strike, racks, spray arms, float, filter, and lower sump for anything that can interrupt the cycle or block water movement.
- Check the drain hose loop, sink knockout, disposer connection, and air gap if the symptom involves standing water, repeated draining, or a cycle that will not complete.
- Use the complete model number from the door or tub tag before ordering any pump, valve, latch, heater, sensor, or control-board category part.
- If the fault returns immediately after these checks, document the exact lights, beeps, and cycle stage; repeated electronic faults usually need meter testing before parts are replaced.
Recommended Parts to Check
Use these as symptom-based starting points, then confirm the exact fit with the full Amana dishwasher model number from the door or tub tag before ordering.
Amana dishwasher drain pump
Most likely when: water stays in the tub, draining sounds weak, or the cycle stops before completing.
Check first: filter, drain hose, disposer knockout, air gap, and the drain path.
Amana dishwasher water inlet valve
Most likely when: the tub does not fill, fills slowly, or stops early after the supply checks out.
Check first: shutoff valve, float, inlet screen, water pressure, and harness connection.
Amana dishwasher control board
Most likely when: lights stay stuck, buttons do not respond normally, or the fault returns after wiring and reset checks.
Check first: breaker reset, door switch signal, keypad response, visible board damage, and loose connectors.
Amana dishwasher door latch or switch
Most likely when: the cycle starts and stops, lights blink after closing, or symptoms change when the door is moved.
Check first: latch strike alignment, door seal pressure, connector fit, and switch continuity.
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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Still Not Working?
If the error returns after the basic checks, stop and recheck the dishwasher model number, wiring connections, water supply, drain path, and any recently replaced part before buying another component.
More options (for a better recommendation)
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📖 View All Error CodesExpert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
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