LG Ac F1 Error Code: Causes and Fixes
Quick answer: Indoor coil sensor issue
What you’ll notice
AC reports an indoor coil (evaporator) sensor fault; unit may run in a safe mode.
LG
Ac
Code F1
medium severity
LG models: LG Dual Inverter compressor models run continuously at variable speed rather than cycling on/off — sustained low-level operation is normal. The washable filter slides out from the top-rear of the indoor unit housing.
Common causes
- Indoor coil temperature sensor failed
- Sensor wire damaged by moisture
Step-by-step fix
- Inspect the sensor on the evaporator coil for physical damage or corrosion.
- Test resistance.
Tools you may need
Multimeter
Prevention
- Drain condensate properly to prevent moisture damage to sensors.
When to stop DIY
Replace the sensor; a failed sensor causes the unit to run in default mode, which wastes energy.
FAQ
What does F1 mean on LG ac?
F1 usually indicates: Indoor coil sensor issue.
Can I keep using the appliance with F1?
Use caution. Severity is medium. Replace the sensor; a failed sensor causes the unit to run in default mode, which wastes energy.
How long does this fix usually take?
Typical first-pass troubleshooting takes 20 minutes.