High
Pilot does not light on Saunier Duval Xeon 120 FF

Your boiler is failing to ignite because the small flame that acts as a match to start the main burner will not stay lit.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

What the manual says

Manufacturer manual

Check for pilot jet blockage, incorrect electrode adjustment, or pilot solenoid continuity between EV1 and COM.

From this model's manual
Verified against the Saunier Duval Boiler Xeon 120ff installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

Engineer required

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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