Viessmann · Vitodens 200-W Boilers
The burner has been locked out because the flue gas temperature sensor is not correctly positioned. This can prevent proper operation and is a safety measure.
Click steps to track your progress.
Reset the appliance after the issue has been addressed.
If the fault persists, contact a qualified technician to correctly position the flue gas temperature sensor.
Ensure the appliance has been reset correctly after the initial fault.