Medium
F.74 on Vaillant ecoFIT Pure 412

Your boiler's internal water pressure sensor is sending an invalid electrical signal, meaning the system cannot accurately read how much pressure is inside.

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

Water pressure sensor signal in the wrong range (too high)

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.73View →

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