LG Mini-Split Error Codes
Error code guides for LG mini-split systems (Art Cool / Dual Inverter). Select your error code for step-by-step diagnosis.
LG error code index
- CH05 Error CodeCommunication error indoor/outdoor
- CH38 Error CodeLow refrigerant pressure / electrical fault
- CH67 Error CodeOutdoor fan motor fault (fan lock)
- Not Cooling But RunningLG unit runs but won't cool
Before you start: quick resets
Many LG faults are triggered by a power fluctuation or temporary condition and will clear on a reset. Turn off the unit at the thermostat, cut power at the breaker for 60 seconds, restore power, then turn the unit back on. If the error returns immediately, the fault is real and you need to diagnose it. If it clears, run the unit for 30 minutes to confirm stability.
If the code returns or never clears: find your specific code in the list above for a targeted diagnosis guide.