Errors

Boiler type WGRTCNG199

Error code Er:66

Cause:

Mixing Valve Error.

Solution:

Press the Power button to clear the Error Code.
If Error happens again:
- Turn power OFF and ON at the main power switch internal to the water heater.
- Check wiring connections to mixing valve. Ensure all are secure.
- Replace mixing valve.
- If the problem persists, replace the main control.