What does the Ferroli A02 fault code mean?

Your boiler thinks it can see a flame even though it should be turned off, which is a safety conflict that prevents it from starting up.

How much does it cost to fix Ferroli error code A02?

Typical repair cost for the Ferroli A02 fault is £120-280 including labour.

Flame detected with the burner off

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.