ErrorCodePro · Appliance Error CodesLG Window air conditioner Error Codes: Full List & Meanings
Every LG window air conditioner error code in the LG window air conditioner error-code chart, as published by Sears PartsDirect, with its meaning. Codes vary by model, so confirm in your owner's manual. Support: LG USA Support (lg.com/us/support).
Codes by system
Control / electronics
All LG window air conditioner error codes
Codes marked "Reset only" or "Service" have no separate page because the manufacturer publishes no owner fix beyond a reset or a service call.
| Code | Meaning | System | Owner action |
|---|---|---|---|
| E1 | Temperature sensor failure. | Heating | Service |
| E2 | Failure in the indoor temperature sensor. | Heating | Service |
| E3 | Abnormal operation protection error. | Heating | Service |
| E4 (Portable A/C only) | Air conditioner is in the defrost mode. | Heating | Service |
| P2 | Water collection tank is full. Also: FL (Portable A/C only) | Control / electronics | Owner checks |
Symptoms
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.