What does the Keston L2 fault code mean?

Your boiler is failing to keep its flame lit, which means the system has safely shut down to prevent issues.

How much does it cost to fix Keston error code L2?

Typical repair cost for the Keston L2 fault is £120-350 including labour.

Check if other gas appliances in your home, like a hob, are working to ensure gas supply.

Flame loss

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

Lockout fault with a reset-needed pattern.

Older boilers — thermocouple, draught, gas supply.

Safety-critical — turn off, read this.