What does the Ariston AA0077 fault code mean?

Your boiler is repeatedly struggling to stay lit and has locked itself out for safety after multiple failed attempts to ignite.

How much does it cost to fix Ariston error code AA0077?

Typical repair cost for the Ariston AA0077 fault is £120-350 including labour.

Check if other gas appliances (like a hob) are working to ensure gas supply

Too many failures to flame in one period during operation

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.