Medium
S.07 on Vaillant Atmomax

Your boiler is staying in a cooling-down phase for too long after being used because it thinks water is still moving through the pipes when it shouldn't be.

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

Heating mode – pump overrun error

Engineer required

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

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Related fault codes

F.75View →S.06View →S.08View →

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