How much does it cost to fix Saunier Duval error code 9 25 blinking?

Typical repair cost for the Saunier Duval 9 25 blinking fault is £150-300 including labour.

9 25 blinking High

Saunier Duval 9 25 blinking Fault Code

Q: What does the Saunier Duval 9 25 blinking fault code mean?

Your boiler has stopped working because it cannot move the hot water around your system effectively, so it has shut down to protect itself.

Also written as 925BLINKING — same fault.

The Saunier Duval 9 25 blinking fault code means: your boiler has stopped working because it cannot move the hot water around your system effectively, so it has shut down to protect itself.. It appears on 2 Saunier Duval models in our database.

Technical description: If the fault (E 25) persists after 5 attempted relights, the boiler shuts down and requires a manual reset. Check that the pump is operating, the central heating isolating cocks are open and that there is circulation in the system.

Typical repair cost £150-300 (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 9 25 blinking fault code

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

Source

Saunier Duval 9 25 blinking 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