Samsung Washer Error Code LO

The LO code on a Samsung washer stands for door unlock failure. It means the washer attempted to unlock the door, typically at the end of a cycle, but the control board did not receive confirmation that the unlock was successful. The cause can range from a loose terminal or broken wire at the door lock assembly to a faulty lock motor or main PCB issue.

It is not recommended to continue running the washer while the LO code is active. The error indicates the door lock system is not functioning correctly, and the machine may keep the door locked or fail to lock it reliably during a cycle. Running the washer with an unreliable door lock could pose a water leak or safety risk.

A power reset, such as unplugging the washer for a few minutes and restarting it, may temporarily clear the LO code if the fault was caused by a momentary signal issue. However, if there is an underlying problem with the door lock terminal, motor, wiring, or PCB, the error will return. A reset alone does not fix the mechanical or electrical fault causing the code.

Some causes of the LO error are accessible to a DIY repair. Checking and reseating the wiring terminals at the door lock switch connector is a reasonable first step that requires no special tools. If the lock motor or contact switch needs replacement, those parts can often be sourced and swapped by someone comfortable with appliance repair. A main PCB fault is a more complex repair and may be better handled by a technician.

Repair costs vary depending on the root cause. Replacing a door lock assembly typically runs in the range of $80 to $180 for parts and labor combined. If the main PCB is at fault, the cost is higher, generally in the range of $200 to $400 or more depending on the specific model and service rates in your area.