Medium
96 on Vaillant ecoTEC plus Regular

Your boiler has entered a restricted technical mode or is experiencing a configuration error that requires a professional to unlock the settings.

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

Access code reserved for the competent person

Engineer required

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

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