What does the Saunier Duval 11. fault code mean?

Your boiler's computer system has encountered an internal error and cannot safely operate your heating or hot water, meaning the unit has shut down.

How much does it cost to fix Saunier Duval error code 11.?

Typical repair cost for the Saunier Duval 11. fault is £250-450 including labour.

There is an internal fault in the Automatic Control Module.

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

Almost always a stuck diverter valve on combis.

Safety-critical — turn off, read this.

7 signs repair isn't worth it anymore.