Errors

Boiler type WGRTCNG199

Error code Er:31

Cause:

Water Inlet Sensor Open or Short.

Solution:

This Error Code will go away when inlet water temperature decreases.
If Error happens again:
- Check inlet water temperature sensor. Ensure connections are secure.
- Check sensor resistance. If resistance is zero, replace the sensor.
- If the problem persists, replace the main control.