Low
Vitotronic 050/200-H on Viessmann Vitola Biferral

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.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

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.

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