Viessmann · Vitodens 200/222 Boilers
The boiler has detected that there is no boiler water circulation. This means water is not flowing properly through the heating system, which can cause overheating and prevent the boiler from operating.
Click steps to track your progress.
Check the heating system fill level and add water if necessary to reach the recommended pressure.
Bleed air from your radiators to remove any trapped air in the system.
Check the circulation pump to ensure it is running and circulating water.
Press the reset button R on the boiler.