High
Does main burner light? (NO) on Saunier Duval Xeon 120 FF

Your boiler is failing to ignite because it is not receiving the necessary electrical signal to open the gas supply.

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.

Technical description

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.

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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