Rinnai Error Codes Search Code or Problem Indoor Unit Error Codes E1 Indoor fan malfunction Learn More E3 Temperature sensor error Learn More E4 Outdoor unit connection failure Learn More E5 Sensor malfunction Learn More E6 Compressor motor error Learn More Outdoor Unit Error Codes F1 Compressor overcurrent Learn More F3 Overvoltage or undervoltage detection Learn More F6 Low-pressure protection Learn More
