Diagnosing your water heater's issue should be an easy task. With the help of using error codes, we can better assist you with what needs to be done to correct an issue.
The list of error codes below is specific to the 20H/20HI models:
Error Code | Error Description | Possible Cause | What To Do |
E0 | Hot water sensor failure | The junction port is loose, short circuit | Call for Service |
E1 | Ignition system failure | The gas valve is not opened or fully opened; the Water shut-off valve is not open; the 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 over heating controller | Call for Service |
E4 | Cold water temperature sensor | Problem with sensor; problem with sensor's plug or socket; none of the above | Replace the sensor, fix it, replace the computer board |
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 |
E8 | Vent pipe block | Vent pipe is blocked | Clean the pipe |
If you need more assistance, please email [email protected].
Our dedicated team is always happy to help!