LG Error Codes Search Code or Problem Indoor Unit Error Codes CH0 Communication error with outdoor unit Learn More CH1 Indoor temperature sensor malfunction Learn More CH2 Indoor humidity sensor malfunction Learn More CH3 Indoor fan motor malfunction Learn More CH4 Coil temperature sensor failure Learn More Outdoor Unit Error Codes F0 High-pressure protection Learn More F3 Low-pressure protection Learn More F5 Compressor motor failure Learn More
