P1
LG Portable Air Conditioner
Severity:What Does This Error Mean?
LG portable AC error P1 means the internal condensate tank is full and the unit has stopped to prevent overflow. Drain the tank by removing the drain plug at the rear of the unit and directing the water into a bucket or drain.
How to Fix It
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Locate the drain plug at the rear
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Remove the drain plug and drain the water
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Refit the drain plug firmly
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Set up continuous drainage
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Ensure the drain hose runs downhill
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Check the room humidity
Frequently Asked Questions
LG portable AC P1 but I already drained it — why is it back so fast?
In high humidity conditions (above 70% RH), a portable AC can fill its tank in just a few hours. Set up continuous drainage to eliminate the need to drain manually.
LG portable AC P1 error after setting up the drain hose — what is wrong?
Check that the drain hose is connected to the upper (continuous drain) port, not the lower (manual drain) port. Also ensure the hose runs continuously downhill with no upward sections.
Does LG portable AC P1 mean the unit is working correctly?
Yes — P1 indicates the unit is successfully extracting moisture from the air (doing its job), but the tank needs emptying. It is not a fault; it is a maintenance notification.