What does the Keston E 00 fault code mean?

Your boiler is detecting a flame inside when it should be turned off, which is a safety issue that requires the system to be shut down.

How much does it cost to fix Keston error code E 00?

Typical repair cost for the Keston E 00 fault is £150-300 including labour.

Flame detected when not expected. Check boiler earth and probe condition.

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

Older boilers — thermocouple, draught, gas supply.

7 signs repair isn't worth it anymore.

Break-even maths on monthly cover.