LG Washer Error Code 15C

The 15C code signals a drain error on the upper washer unit of your LG washer. It indicates the drain pump has failed to operate correctly, which can be caused by a foreign material blockage in the pump, loose wiring connections, a defective pump motor, or a fault on the main control board. The washer will halt its cycle until the issue is resolved.

No, it is not recommended to continue running the washer while the 15C code is active. The washer cannot complete the drain cycle, which means water may remain in the drum and could overflow or cause secondary issues. Address the drain fault before running another cycle.

A reset may temporarily clear the 15C code, but if the underlying cause has not been fixed, the error will return as soon as the washer attempts to drain again. Resetting is useful for confirming whether the fault is intermittent, such as a loose connector, but it does not resolve a blocked pump or a failed component. Always diagnose and correct the root cause before relying on a reset.

Start by checking the drain pump for any foreign objects such as coins or debris that may be restricting the impeller. Next, inspect the wire connectors at the drain pump and the main PB to make sure they are fully seated and undamaged. If the pump is clear and connections are secure but the code persists, the pump motor or main control board may need to be tested and replaced.

If the issue is simply a clogged pump or a loose wire connector, repair costs can be minimal, potentially just a service call fee in the range of $75 to $150. If the drain pump motor needs replacement, parts and labor typically run between $150 and $350 depending on your location and the specific pump assembly required. A main control board replacement is generally the most expensive repair, often ranging from $250 to $500 or more.