Drain Required
LG Portable Air Conditioner
Severity:What Does This Error Mean?
LG portable AC Drain Required means the internal condensate water tank is full or nearly full. Drain the unit via the lower drain port, then consider setting up continuous drainage to avoid interruptions during cooling.
How to Fix It
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Turn off the unit before draining
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Place a container under the lower drain port
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Remove the drain plug and drain fully
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Refit the drain plug securely
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Connect the continuous drain hose for hands-free drainage
Frequently Asked Questions
LG portable AC drains correctly but the Drain Required message reappears quickly?
In high humidity conditions the internal tank fills within a few hours. Set up continuous drainage using the upper drain port to avoid repeated drain reminders during cooling.
LG portable AC Drain Required light flashing after I drained it — why?
Ensure the drain plug is fully reseated after draining. If the lower drain port is not sealed, the float switch inside may remain in the triggered position. Also check the upper drain hose is not blocked if you are using continuous drainage.
How much water does a LG portable AC collect per day?
In high-humidity conditions, an LG portable AC can collect 2–5 litres per hour depending on the model and humidity level. In drier conditions collection is much lower.