Medium
2F:0 on Viessmann Vitodens 050-W

Your boiler is currently stuck in or has failed to complete its internal air-purging process, preventing it from firing up normally.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

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This fault should be looked at by a Gas Safe engineer within the next week or two. It may get worse if left.

Technical description

Ventilation program/filling program inactive

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Related fault codes

2F:1View →

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