Viessmann Vitotronic 050/200-H Fault Code
Also written as VITOTRONIC050200H — same fault.
The Viessmann Vitotronic 050/200-H fault code means: your heating system is essentially ignoring its outdoor weather sensors once the temperature drops below freezing, which may cause it to run at a constant temperature regardless of the weather.. It appears on 5 Viessmann models in our database.
Technical description: Activates after 0°C / 32°F outdoor temperature
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Viessmann models that show the Vitotronic 050/200-H fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Viessmann Vitotronic 050/200-H fault code information on this page is sourced and cross-checked against the official Viessmann service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026