What does the Ariston AA 0011 fault code mean?

Your boiler has failed to light the flame three times in a row, so it has locked itself out to prevent a gas buildup.

How much does it cost to fix Ariston error code AA 0011?

Typical repair cost for the Ariston AA 0011 fault is £120-250 including labour.

No flame after safety time (7 seconds)

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.

7 signs repair isn't worth it anymore.