What does the Ferroli F4 fault code mean?

Your boiler has lost water pressure and needs to be topped up to work properly.

How much does it cost to fix Ferroli error code F4?

Typical repair cost for the Ferroli F4 fault is £0-120 including labour.

Locate the filling loop, which is usually a flexible silver hose under the boiler.

Insufficient system pressure. Fill the system to 1-1.5 bar by use of the filling loop.

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.