LG Air Conditioner Error Code FL

FL stands for water full and indicates that the condensate collection pan inside the unit has reached its capacity. The air conditioner will stop running to prevent overflow. You need to drain the collected water before the unit will resume normal operation. This is a built-in protective function, not an indication of a broken component in most cases.

No. When FL is displayed, the unit has already shut itself off to protect against overflow. Attempting to bypass or ignore this code risks water spilling into your living space, which can damage floors, walls, and nearby electronics. Drain the unit before resuming operation.

In most cases, resolving FL costs nothing because it simply requires draining the unit. If a clogged drain port needs cleaning, that is also typically a no-cost DIY task. If the float switch or water level sensor has failed and needs replacement, parts and labor costs can range from roughly $50 to $150 depending on the model and whether a technician is needed.

Start by draining the base pan using the drain plug located on the unit, or tilt the unit carefully to allow water to exit as described in the product guide. Once drained, the code should clear and the unit should restart. If the FL code returns quickly after draining, inspect the drain port for clogs and check that any connected drain hose is routed with a downward slope and free of kinks.

A power reset alone will not permanently clear the FL code if the base pan is still full of water. The unit may briefly restart after a reset, but the float switch or water level sensor will trigger FL again almost immediately. The water must be physically removed from the pan first, after which the code will clear on its own.