What does the Saunier Duval 03 fault code mean?

Your boiler is struggling to clear exhaust gases or draw in fresh air properly, so it has safely shut itself down to prevent unsafe operation.

How much does it cost to fix Saunier Duval error code 03?

Typical repair cost for the Saunier Duval 03 fault is £150-350 including labour.

Air fault lock

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.

Each noise points to a different fault.

7 signs repair isn't worth it anymore.