Whirlpool Washer Error Code dU

The dU code means the washer experienced a door or lid unlock failure. The control system tried to retract the lid lock bolt but could not confirm the lid reached an unlocked state. This can result from physical obstructions, buildup around the lock mechanism, or an electrical fault in the lock or control board.

You should not attempt to force the lid open or continue running the washer while the dU code is active. The washer is alerting you that it cannot confirm the lid lock state, which means the lid locking system is not operating reliably. Continuing to use the machine without resolving the issue could cause further damage to the lock assembly or control components.

If the issue is only buildup or an external obstruction, there may be no parts cost involved. Replacing a lid lock assembly typically costs between $30 and $100 for the part, with additional labor if a technician performs the repair. A control board replacement is the most expensive scenario, generally ranging from $150 to $350 or more depending on the specific model.

Start by removing any items placed on top of the lid and checking the lock assembly for detergent or residue buildup around the bolt and receiver. Clean any buildup and try restarting the washer. If the code persists, the diagnostic procedure TEST #8 should be performed to evaluate the lock mechanism, associated wiring, and control board function.

A reset may temporarily clear the code from the display, but if the underlying cause is not addressed, the dU code will return. Physical causes like lid weight or wash media buildup must be corrected, and component-level faults in the lock assembly or control board require proper diagnosis and repair before the error is fully resolved.