LG Dryer Error Code dO

The dO code on an LG dryer means the control board detected an open-door condition that lasted more than 0.25 seconds during operation. The dryer stops or refuses to run as a safety response. The fault points to the door switch circuit, which includes the switch itself, the door latch assembly, and the wiring connecting them to the control board.

No, you should not attempt to bypass or ignore the dO code. The dryer is designed to stop operation when the door is detected as open to prevent injury from the rotating drum and heat. Resolve the underlying cause before running the dryer again.

If the fix is simply reseating a loose wire terminal, there may be no parts cost at all. Replacing a door switch typically costs between $10 and $40 for the part, while a door latch assembly can range from $15 to $60 depending on the model. Adding professional labor, the total repair cost generally falls between $75 and $200.

Start by closing the door firmly and attempting to restart the dryer. If the code returns, inspect the door latch and strike plate for wear or damage, and check the wire terminals at the door switch for looseness or corrosion. If the latch and wiring are intact, test the door switch for continuity and replace it if it does not show a closed circuit when the door is latched.

A reset may temporarily clear the code, but it will return if the underlying fault is not corrected. To reset, unplug the dryer for a few minutes and then plug it back in. If the door switch, latch, or wiring is defective, the dO code will reappear once the dryer attempts to operate.