Low
S.11 on Heatline Vizo 24

Your boiler is currently preparing to ignite, but the internal fan is checking its position before the system starts burning fuel.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Pre-run fan

DIY fix possible

Check if any other error codes appear permanentlyNo action required as this is a normal status messageMonitor the boiler to ensure it transitions to ignition

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