How much does it cost to fix Saunier Duval error code 00.?

Typical repair cost for the Saunier Duval 00. fault is £150-300 including labour.

00. Emergency

Saunier Duval 00. Fault Code

Q: What does the Saunier Duval 00. fault code mean?

Your boiler has detected a signal suggesting a flame exists when it is actually turned off, which is a safety concern that prevents it from starting to avoid a potential gas buildup.

Also written as 00 — same fault.

The Saunier Duval 00. fault code means: your boiler has detected a signal suggesting a flame exists when it is actually turned off, which is a safety concern that prevents it from starting to avoid a potential gas buildup.. It appears on 2 Saunier Duval models in our database.

Technical description: There is a flame signal without there being a flame present.

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 00. fault code

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

Source

Saunier Duval 00. 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