LG Dishwasher Error Code dC3

The dC3 code means the dishwasher's Auto Door Open system attempted to open the door at the end of a cycle but could not confirm the door opened, even after retrying three times. The control board activates an actuator to release the door and then checks a door sensing switch for confirmation. When that confirmation never comes after three attempts, the dC3 error is displayed. The fault points to a problem with the actuator, the sensing switch, or the wiring connecting them.

The dC3 fault affects the auto door open drying function rather than the wash cycle itself, so the dishwasher may still be able to run wash cycles. However, continuing to operate the appliance with an active fault is not generally recommended, as repeated actuator firing attempts could cause further wear. Addressing the underlying issue promptly is the safer approach.

A reset may temporarily clear the dC3 code from the display, but the error will return if the underlying fault with the actuator or door sensing switch has not been resolved. The control board will retry the door open sequence at the end of the next cycle and log the fault again if it still cannot confirm the door opened. A reset is useful for confirming whether a fault was intermittent, but it is not a repair.

Some causes of dC3 are DIY-accessible, particularly checking and reseating the wiring connectors at the actuator and door sensing switch. Clearing a mechanical obstruction near the door is also straightforward. However, replacing the actuator or sensing switch requires disassembling parts of the door panel, which is more involved and may be better handled by a technician if you are not comfortable with appliance repair.

Repair costs depend on which component has failed. If only a wiring connection needs to be reseated, there may be no parts cost at all, though a service call typically runs between $75 and $150. Replacing the door sensing switch or auto door open actuator generally adds $20 to $100 in parts cost, with total repair bills commonly ranging from $100 to $300 depending on labor rates in your area.