What does the Ariston A01 fault code mean?

Your boiler has stopped working because it tried to light three times but could not detect a flame.

How much does it cost to fix Ariston error code A01?

Typical repair cost for the Ariston A01 fault is £100-£350 including labour.

Check if other gas appliances in your home (like a hob) are working to ensure your gas supply is on.

Electronic system shutdown because the supply of gas has been cut off (after third attempt to ignite the burner).

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.