BoilerFaultCodesFerroli Boiler lock out Fault Code
Also written as BOILERLOCKOUT — same fault.
The Ferroli Boiler lock out fault code means: your boiler has stopped working for safety reasons and needs a manual reset after investigating potential blockages or gas supply issues.. It appears on 3 Ferroli models in our database.
Technical description: In the event of the red lockout light ( ) coming on. Check gas supply or condensate discarge. Clean condensate discharge if dyirty or obstructed.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Ferroli models that show the Boiler lock out fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ferroli Boiler lock out fault code information on this page is sourced and cross-checked against the official Ferroli service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026