Error Code | Error Description | Possible Cause | What to Do |
E0 | Hot water sensor failure | Junction port loose, short circuit | Call for service |
E1 | Ignition system failure | The gas valve is not opened or fully opened. Water shut-off valve is not open, Junction port loose. | Check and open gas fully, Check and open water valve, Call for service. |
E2 | There is flame when no water is coming in | Electric circuit problem | Call for service |
E3 | Over-heating protection | Dry combustion, problem of overheating controller | Call for service |
E5 | Pressure switch | Motor problem. Voltage of power supply is too low | Call for service |
E6 | Over-heating | Gas pressure is too high, water shutoff valve is not fully opened. The temperature is set too low. | Check shut-off valve and open fully. Increase temperature setting. |
E7 | Solenoid Valve | Open Circuit of the valve, short circuit of the valve, none of the above | Connect the valve, replace the valve, replace the computer board. |
i12 Error Code Table
Updated over 11 months ago