What does the Keston E23 fault code mean?

Your boiler is struggling to detect the correct amount of water inside the system, which is preventing it from firing up.

How much does it cost to fix Keston error code E23?

Typical repair cost for the Keston E23 fault is £150-250 including labour.

Water filling error - check water pressure sensor.

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.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.