What does the Saunier Duval Safety lock-out fault code mean?

Your boiler has detected trapped air bubbles that are preventing it from running safely, so it has shut down to protect itself.

How much does it cost to fix Saunier Duval error code Safety lock-out?

Typical repair cost for the Saunier Duval Safety lock-out fault is £80-120 including labour.

Check your radiator valves and make sure there are no leaks

The boiler will go into safety lock-out if air is not properly purged from the system during filling.

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.