BoilerFaultCodesIkon Neon 1 not lit Fault Code
Also written as NEON1NOTLIT — same fault.
The Ikon Neon 1 not lit fault code means: your boiler is not receiving power, which could be due to a simple external electricity issue or an internal fuse failure.. It appears on 1 Ikon model in our database.
Technical description: Fault with mains supply or PCB fuse
DIY fix possible
Check if other appliances in your home have powerEnsure the boiler's isolation switch (fused spur) is turned onCheck your consumer unit (fuse box) to see if a circuit breaker has tripped
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Ikon models that show the Neon 1 not lit fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Ikon Neon 1 not lit fault code information on this page is sourced and cross-checked against the official Ikon service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026