LG Air Conditioner Error Code P2

The P2 code means the unit has detected a water full condition in the base pan for a continuous period of 10 seconds. This triggers a protective shutoff to prevent overflow. The most common cause is a blocked condensate drain preventing water from exiting the unit normally. Removing the water from the base pan and clearing the drain path is the standard corrective procedure.

No, you should not continue operating the unit while P2 is active. The unit typically shuts down automatically when this code appears, and that shutoff is a protective function. Running the unit with water pooled in the base pan risks overflow onto floors or nearby surfaces and can potentially cause internal damage. Address the drainage issue before resuming normal operation.

If the cause is a clogged drain or improper installation angle, the repair can often be completed at no parts cost, with only labor or your own time involved. If the condensate drain hose requires replacement, parts costs are typically low, in the range of a few dollars to around $20 depending on the hose. A faulty water level sensor requiring professional diagnosis and replacement could bring total repair costs into the $75 to $200 range depending on your area and service provider rates.

Start by removing all accumulated water from the base pan, which is the first required step before the unit will reset. Next, inspect the condensate drain hole and drain hose for clogs, kinks, or improper slope and clear any blockages you find. Confirm the unit is tilted slightly toward the drain outlet side so water flows out freely. If the code returns after these steps, the water level sensor may need to be inspected or replaced.

A reset alone will not permanently clear the P2 code if the underlying cause has not been resolved. The unit may restart briefly after a reset, but if the condensate drain is still blocked or the base pan refills with water, the sensor will detect the full condition again and the P2 code will return within seconds. You must remove the water and correct the drainage problem for the code to stay cleared.