What does the Ariston 40-80 (ll-ll) fault code mean?

Your boiler has stopped working because the water pressure inside your heating system has dropped too low.

How much does it cost to fix Ariston error code 40-80 (ll-ll)?

Typical repair cost for the Ariston 40-80 (ll-ll) fault is £80-150 including labour.

Locate the filling loop, which is a silver braided hose with one or two valves underneath the boiler.

Low water pressure in the heating system

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

Six most common causes of dropping pressure.

Step-by-step using the filling loop.

7 signs repair isn't worth it anymore.