Electrolux Dishwasher Error Code uo

The UO code means the dishwasher control board is not receiving a signal confirming that the vent door is closed. The control attempts to reseat the vent up to 5 times automatically, and if all attempts fail, the error is displayed and the cycle will not start. The fault involves the vent door assembly and the optical sensor that monitors its position.

A reset may temporarily clear the code, but if the underlying cause is not corrected, the code will return as soon as the dishwasher attempts to start a new cycle. The control will again try 5 times to confirm vent closure, and the fault will reappear if the vent door or sensor issue has not been resolved. Address the root cause before relying on a reset.

If the issue is simply debris or buildup blocking the vent door, there may be no parts cost at all. Replacement of the vent door assembly or optical sensor typically ranges from around $30 to $100 for parts depending on the model. If professional labor is required, total repair costs including diagnosis and parts generally range from $100 to $250.

In many cases, yes. Start by inspecting the vent door assembly for debris, detergent buildup, or physical damage that would prevent it from closing. Clean the vent area and the optical sensor lens carefully. If the door assembly or sensor is physically damaged or electrically failed, part replacement will be required and may need a technician depending on your comfort level with appliance repair.

The dishwasher is designed to prevent cycle operation when this error is active, so you will not be able to run a wash cycle until the fault is resolved. This protective behavior is intentional, as running with an improperly seated vent could allow excess steam or moisture to escape into surrounding cabinetry. Do not attempt to bypass the error; resolve the vent issue first.