Viessmann · Vitodens 200/222 Boilers
The boiler has experienced a flame failure during the stabilization phase of ignition. This indicates that the flame ignited but could not be maintained or properly detected.
Click steps to track your progress.
Check the ionization electrode for proper positioning, cleanliness, and any damage.
Ensure all electrical connections to the ionization electrode are secure and tight.
Press the reset button R on the boiler.
If the fault persists, contact a qualified technician to inspect the combustion system.