How much does it cost to fix Ferroli error code E09?

Typical repair cost for the Ferroli E09 fault is £180-350 including labour.

E09 High

Ferroli E09 Fault Code

Q: What does the Ferroli E09 fault code mean?

Your boiler has detected an internal electrical problem that prevents it from safely controlling the gas supply, so it has shut down to protect your home.

The Ferroli E09 fault code means: your boiler has detected an internal electrical problem that prevents it from safely controlling the gas supply, so it has shut down to protect your home.. It appears on 1 Ferroli model in our database.

Technical description: Gas valve control circuit fault

Typical repair cost £180-350 (including labour)

Engineer required

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

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Ferroli models that show the E09 fault code

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

Maxima 35 S Repair: £180-350

Source

Ferroli E09 fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026