ERROR CODE EXPLAINED
LG Air Conditioner
LG Air Conditioner F4 Error Code
What it means
The air conditioner detected a low-refrigerant condition or refrigerant-related protection condition.
Try this first
- If the unit was recently installed or relocated, contact the installer.
- Have the refrigerant piping and connections inspected.
- If the unit was previously operating normally, turn power off for about 5 minutes and restart once.
Can I keep using it?⚠ Refrigerant system should be checked
Repair usually required?🔴 Professional inspection may be required
If the error keeps returning
If F4 returns after the recommended troubleshooting, LG recommends inspection or service.
Official source
Troubleshooting information verified against manufacturer support documentation.
View manufacturer support page →Safety note:ApplianceSignal provides general troubleshooting information. Always follow the appliance manufacturer's safety instructions and disconnect power when required.