What does the Ferroli F40 fault code mean?

Your boiler has detected that the water pressure inside your heating system is dangerously high, causing it to shut down to prevent internal damage.

How much does it cost to fix Ferroli error code F40?

Typical repair cost for the Ferroli F40 fault is £80-150 including labour.

Check that the silver filling loop valves are tightly closed.

Incorrect system water pressure (Pressure too high above 3 - 5 bar)

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.

Step-by-step using the filling loop.

7 signs repair isn't worth it anymore.