The error code 10 indicates a combustion abnormality and is usually a precursor to the more severe error code 90. Consider the error code 10 as a warning of more severe problems and the error code 90 if proper steps are not taken to resolve. The troubleshooting steps for both error code 10 and error code 90 are the same.
This error can occur for several reasons:
- Incorrect installation settings.
- Low air flow rate (ie: Incorrect Venting, Dirty or Clogged Terminations or Filters)
- Low gas flow rate or heating value (ie: Incorrect gas line size, too long of gas line, too small a gas meter)
All the above reasons will result in the unit not producing the correct hot water outlet temperature.
To troubleshoot, verify the following installation settings:
- Elevation setting.
- Vent type setting.
- Vent length setting.
- Vent size setting.
- Common vent setting.
You can change the water heater settings with the buttons on the circuit board or a smartphone app called “EZ Start Plus” using the built-in Bluetooth. For detailed setup instructions, please refer to the installation manual.
Below are the settings you can configure using the buttons on the circuit board:
- Elevation
- Gas Type (Require gas conversion procedure to be completed)
- Vent Type (DV, SV, OD, Flex)
- Vent Length
- Vent Size
- Common Vent
This error can also result from low primary gas pressure or a low gas heating value. You will need to verify that under all conditions, the heater is receiving the correct inlet gas pressure.
To reset this error, disconnect and reconnect the power. If the error persists, contact your nearest service agent.
If “908” is displayed, it means an internal lock has been activated and the error cannot be reset.
For further technical assistance call 866-766-7489 or use our Contractor Locator to find a local service representative.