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.

11. High

Saunier Duval 11. Fault Code

Q: 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.

Also written as 11 — same fault.

The Saunier Duval 11. fault code means: 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.. It appears on 2 Saunier Duval models in our database.

Technical description: There is an internal fault in the Automatic Control Module.

Typical repair cost £250-450 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Find a Gas Safe engineer

Search the official register for a qualified engineer in your area.

Gas Safe Register →

Saunier Duval models that show the 11. fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Saunier Duval 11. fault code information on this page is sourced and cross-checked against the official Saunier Duval service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026