What does the Vaillant F.74 fault code mean?

Your boiler has detected an electrical issue with its internal pressure sensor, meaning it cannot accurately tell how much water is in the system.

How much does it cost to fix Vaillant error code F.74?

Typical repair cost for the Vaillant F.74 fault is £130-210 including labour.

Water pressure sensor signal outside correct range, the sensor signal is too high

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Six most common causes of dropping pressure.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.