Cause of error code Er:68

Mixing Valve Operation Error (Mixing Valve Stuck in Initial Position)

Solution for error code Er:68

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

- Turn power OFF and ON at the main power switch internal to the appliance. 
- Check wiring connections to mixing valve. Ensure all are secure. 
- Replace mixing valve. 
- If the problem persists, replace the main control.