What does the Keston F1 fault code mean?

Your boiler has detected that there is not enough water in the system to operate safely, which has caused it to shut down.

How much does it cost to fix Keston error code F1?

Typical repair cost for the Keston F1 fault is £60-120 including labour.

Locate the filling loop (usually a silver flexible hose) underneath or near the boiler.

Low water pressure

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.