Cause of error code Er80

Low Water Level Sensor (Low Water Level Detected Four (4) Consecutive times)

Solution for error code Er80

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

- Ensure all valves are open to the boiler and there are no leaks.
- Ensure all air has been purged from the system.
- 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.