LG · Room air conditioner
FL
Professional service requirederror code
LG FL is a model-dependent alternate display for the CH04 condensate condition on covered window or portable air conditioners.
Market, product family, and model applicability
US · en-US · LG window and portable air conditioners whose model or software shows FL for CH04
product family applicable: The official source applies at the product-family level. Exact controls can still vary by model.
Check the official model/manual lookup (opens in a new tab)What you can do now
Power off and unplug the unit, drain the documented external condensate port, and securely replace its cap.
- Drain condensate through the documented external port and securely replace the cap.
Stop and get service when
Request LG inspection if FL occurs frequently even on dry days.
- Power off and unplug the air conditioner before using its documented lower rear drain port.
- Request LG inspection if FL occurs frequently even on dry days.
Do not do
Do not access internal drains, wiring, refrigerant, fans, or sealed-system components.
Use only the accessible drain port documented for window and portable units; do not open the cabinet.
If the message returns
If FL returns frequently in dry conditions, request LG inspection.
Source and scope
Official manufacturer source- Market and locale
- US · en-US
- Product family
- window and portable air conditioners
- Official source last checked
- July 26, 2026
- Review status
- Automated evidence review completed · Owner-delegated approval
LG
[LG Air Conditioner] Guide to Error Codes · Official error-code index
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