Medium
d.24 on Vaillant ecoFIT Pure 412

Your boiler's water pressure sensor is reporting that the system has detected an issue with the internal water pressure or the sensor itself is not registering correctly.

Book a service

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

Status of the pressure monitor (off=Not switched, on=Switched)

Engineer required

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

Find a Gas Safe engineer
Search the official register →

Related fault codes

Related guides you might find useful