What to do if my Wolf CGG-1K-24 has TBV excess temperature?
- JJeff BartonAug 22, 2025
If your Wolf Boiler indicates a TBV excess temperature error, it means the flow temperature has exceeded the limit. First, check the system pressure and heating circuit pump. Then, inspect the HC pump step switch and vent the heating system. Press the reset button. If the problem persists, the heat exchanger may be severely contaminated and require cleaning.