ErrorHelp.us

Heating  Heating

Brand

Triangle-tube Triangle-tube List all brands

Type:

MARQUIS TWH200 view MARQUIS TWH200 List all types

Error code:

66
List all errors


Error code: 66

Cause of error code 66

Mixing Valve Error

Solution for error code 66

Press the Power button to clear the Error Code. If Error happens again:
1. Turn power OFF and ON at the main power switch internal to the water heater. 2. Check wiring connections to mixing valve. Ensure all are secure.
3. Replace mixing valve.
4. If the problem persists, replace the main control.


Share this page: Facebook Twitter





© 2025 ErrorHelp.us