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

Typical repair cost for the Saunier Duval Flashing pressure fault is £80-150 including labour.

Flashing pressure High

Saunier Duval Flashing pressure Fault Code

Q: What does the Saunier Duval Flashing pressure fault code mean?

Your boiler has detected that the water pressure level inside the heating system has dropped below the required amount to operate safely.

Also written as FLASHINGPRESSURE — same fault.

The Saunier Duval Flashing pressure fault code means: your boiler has detected that the water pressure level inside the heating system has dropped below the required amount to operate safely.. It appears on 2 Saunier Duval models in our database.

Technical description: Water pressure fault.

Typical repair cost £80-150 (including labour)

DIY fix possible

Locate the filling loop, which is usually a silver braided hose with one or two small valves underneath the boiler.Slowly open the valves to allow mains water into the system until the pressure gauge needle reaches the green zone (typically 1.0 to 1.5 bar).Close the valves tightly to stop the flow of water and check the display to see if the flashing warning has cleared.

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Saunier Duval models that show the Flashing pressure fault code

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

Source

Saunier Duval Flashing pressure 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