What does the Keston C0 fault code mean?

Your boiler has developed a communication problem with its internal memory chip, meaning it does not recognize its own settings and cannot start.

How much does it cost to fix Keston error code C0?

Typical repair cost for the Keston C0 fault is £120-350 including labour.

Boiler Chip Card (BCC) activation fault

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

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.