LG Window air conditioner Error Code P2: Meaning & How to Fix It

By the ErrorCodePro Editorial Team · Last reviewed October 20, 2026

LG window air conditioner error code P2 means: Water collection tank is full. [1] Keep using it? Only if the owner checks below clear the code; if it returns, stop and book a repair. Start with the owner checks below, beginning with: write down the code and model number.

Source: LG window air conditioner error-code chart, via Sears PartsDirect [1].

Quick facts

Code	P2
Also shown as	FL (Portable A/C only)
Brand / appliance	LG window air conditioner
System	Control / electronics
Meaning (service chart)	Water collection tank is full. [1]
Keep using it?	Only if the owner checks below clear the code; if it returns, stop and book a repair
DIY-safe?	Owner checks only (listed below)
Support	LG USA Support (lg.com/us/support)
Source document	LG window air conditioner error-code chart (via Sears PartsDirect)

On this page: Meaning · Steps · Parts · When to call a technician · Related codes · FAQ

What error code P2 means on an LG window air conditioner

Water collection tank is full. [1]

This is a control / electronics code. Codes and wording can vary by model, so check your owner's manual for your model number.

How to fix LG window air conditioner error code P2 (safe owner checks)

Safety first: disconnect power before you remove any panel or reach into the sump or drum. Do not touch wiring, the control board or the motor. If you see water near electrical parts, stop and call a technician. These steps are based on the LG window air conditioner error-code chart (via Sears PartsDirect) [1], rewritten for clarity.

Write down the code and model number. Note exactly what the display shows (P2) and copy the full model number from the rating label, so you can confirm this chart applies to your window air conditioner and order the right parts.
Empty the water collection tank. Empty the water collection tank.
Do a power reset. Unplug the unit for one minute, plug it back in and restart it. If the code returns right away, stop and book a repair.
Test and decide. Run a short cycle or restart and watch the display. If P2 comes back after these checks, stop using the air conditioner for this function and call a technician, because the remaining causes need meters or part replacement.

The first and last steps (and the power reset) are general owner checks added by ErrorCodePro; the rest follow the LG window air conditioner error-code chart published by Sears PartsDirect, rewritten for safe owner use.

Parts that may be involved

Exact parts depend on your model number. This page lists part types only, never part numbers.

Collection tank float switch
Sensor Water filters Find the perfect fit for your refrigerator. Try our water filter finder Most common symptoms to help you fix your room air conditioners View all Why is water leaking into the house from my window air conditioner? Main causes: clogged condensate drain
Air conditioner not leveled properly
Leaky window air seals ... Read more Why your window AC compressor is not turning on? Main causes: bad compressor
Lack of refrigerant
Bad compressor start relay
Electronic control board failure... Read more Why won't my window air conditioner start? Main causes: lack of electrical power
Bad electronic control board

When to call a technician

If the P2 or FL code appears when the tank is empty, a technician should replace the float switch or sensor in the collection tank.
Anything involving wiring, the control board, the motor or the water valve electrics
The appliance is under warranty: contact LG USA Support (lg.com/us/support) first

Frequently asked questions

What does error code P2 mean on an LG window air conditioner?

The LG window air conditioner error-code chart lists P2 as follows: Water collection tank is full.

Is it safe to keep using the window air conditioner with P2?

Only if the owner checks below clear the code; if it returns, stop and book a repair.

Can I fix LG window air conditioner error P2 myself?

Only with the owner checks on this page, starting with: write down the code and model number. If it persists, call a technician or LG USA Support (lg.com/us/support).

Is FL (Portable A/C only) the same as P2?

Yes. The source chart lists FL (Portable A/C only) with the same meaning as P2; the display format depends on the model.

Sources

Sears PartsDirect: LG window air conditioner error-code chart (third-party copy of manufacturer service data)

Last reviewed: October 20, 2026. ErrorCodePro is not affiliated with LG.