Low
d.11 on Vaillant ecoFIT Pure 412

Your boiler is currently monitoring how water flows through your heating system, and this status message indicates the pump responsible for moving that water is being checked.

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

Status of the heating circuit's shunt pump

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.22View →F.75View →

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