High
Does main burner light? (NO) on Saunier Duval Xeon 30ff

Your boiler is failing to ignite because it is not receiving the necessary electrical signal to release the gas required for the flame.

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

Is there 230V~ between main multi-functional control solenoid black and blue cables? If NO, isolate supply, test harness and replace as required. If YES, replace multi-functional control.

From this model's manual
Verified against the Saunier Duval Boiler Xeon 40ff 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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