LG Washer Error Code LO

The LO error code on an LG washer means the door unlock operation failed. The washer attempted to unlock the door but did not receive confirmation from the door lock switch that the unlock was successful. This fault can be caused by a defective door lock switch, wiring issues, or a main PCB failure. The washer will stop operation until the underlying problem is identified and corrected.

No, you should not attempt to run the washer while the LO error is active. The fault indicates the door lock system is not functioning correctly, which means the door may not be securely latched or may not release properly after a cycle. Operating the washer in this condition could result in water leakage or difficulty opening the door mid-cycle. Diagnose and resolve the fault before resuming use.

A reset may temporarily clear the LO error code, but it will return if the underlying problem has not been fixed. To reset, unplug the washer for a few minutes and then restore power. If the fault reappears when you attempt to run a cycle, the door lock switch, wiring, or PCB still requires diagnosis and repair. A reset alone is not a fix for this fault.

Many of the causes of the LO error are accessible to a skilled DIYer. Start by inspecting the door lock switch terminals for loose connections or corrosion, and check the wiring harness for visible damage. If you have a multimeter, test the door lock switch resistance to determine if the switch has failed. Replacing the door lock switch assembly is a relatively straightforward repair, but main PCB replacement should be approached carefully due to the cost of the part.

Repair costs will vary depending on the root cause. A replacement door lock switch assembly typically ranges from about $20 to $70 for the part. If the main PCB is at fault, parts alone can cost anywhere from $100 to $300 or more. Adding professional labor, total repair costs can range from $100 to $400 depending on the component that needs replacement and your geographic location.