How much does it cost to fix Ferroli error code F8?

Typical repair cost for the Ferroli F8 fault is £150-300 including labour.

F8 High

Ferroli F8 Fault Code

Q: What does the Ferroli F8 fault code mean?

Your boiler has detected an issue with the flame detection system, meaning it cannot reliably tell if the burner is lit, so it has safely shut itself down to prevent gas from escaping.

The Ferroli F8 fault code means: your boiler has detected an issue with the flame detection system, meaning it cannot reliably tell if the burner is lit, so it has safely shut itself down to prevent gas from escaping.. It appears on 4 Ferroli models in our database.

Technical description: Flame circuit fault

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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Ferroli models that show the F8 fault code

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

Arean Repair: £150-300
Maxima 35 S Repair: £150-300
Optima 201 Repair: £150-300
Optimax Repair: £180-450

Source

Ferroli F8 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