Viessmann · Vitodens 200-W Boilers
The burner is in a fault state due to a short circuit in the common supply temperature sensor or the high limit safety cutout. This is a critical safety and operational component.
Click steps to track your progress.
Reset the appliance.
If the fault persists, contact a qualified technician to check the supply temperature sensor/high limit safety cutout and its lead.
Ensure the appliance has been reset correctly after the initial fault.