Cause of error code Er85

Freeze Protection (Boiler has detected water temperature below 34ºF (1ºC)

Solution for error code Er85

This Error Code will go away when the freezing condition is remedied.
If Error happens again:

- Ensure boiler is located in a mechanical room protected from freezing conditions.
- Ensure all valves are open to the boiler, there are no leaks.
- Check wiring connections to low water level sensor. Ensure all are secure.
- Check low water level sensor resistance. If resistance is zero, replace the sensor.
- If the problem persists, replace the main control.