How much does it cost to fix Saunier Duval error code 02?

Typical repair cost for the Saunier Duval 02 fault is £150-300 including labour.

02 High

Saunier Duval 02 Fault Code

Q: What does the Saunier Duval 02 fault code mean?

Your boiler has detected an issue with its internal ventilation system, meaning it has safely shut down because it cannot clear exhaust gases properly.

The Saunier Duval 02 fault code means: your boiler has detected an issue with its internal ventilation system, meaning it has safely shut down because it cannot clear exhaust gases properly.. It appears on 10 Saunier Duval models in our database.

Technical description: Air fault, pressure switch, no power to fan

Typical repair cost £150-300 (including labour)

Engineer required

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

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Saunier Duval models that show the 02 fault code

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

Source

Saunier Duval 02 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