What does the Ariston A 01 fault code mean?

Your boiler has detected that it has become too hot and has automatically shut itself down to prevent damage.

How much does it cost to fix Ariston error code A 01?

Typical repair cost for the Ariston A 01 fault is £120-250 including labour.

Overheating lock out / Heat exchanger thermo fuse

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

Each noise points to a different fault.

Work through these before the call-out.

Lockout fault with a reset-needed pattern.