How much does it cost to fix Saunier Duval error code E09?

Typical repair cost for the Saunier Duval E09 fault is £150-250 including labour.

E09 High

Saunier Duval E09 Fault Code

Q: What does the Saunier Duval E09 fault code mean?

Your boiler is struggling to accurately read how much water is inside its system, which is preventing it from safely starting up the heating or hot water.

The Saunier Duval E09 fault code means: your boiler is struggling to accurately read how much water is inside its system, which is preventing it from safely starting up the heating or hot water.. It appears on 6 Saunier Duval models in our database.

Technical description: Water pressure sensor fault

Typical repair cost £150-250 (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 E09 fault code

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

Source

Saunier Duval E09 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