High
Pump does not run on Saunier Duval Xeon 120 FF

Your boiler is not circulating water because the part responsible for pushing it around is failing to start even when the boiler is asking for heat.

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

Check SL (Switched Live) application. If pump fails to run with SL applied, faulty PCB.

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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