BoilerFaultCodes Neon SG Low
Boiler Fault Code Neon SG
Also written as NEONSG — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Neon SG appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is currently trying to light the burner and you are seeing the normal indicator for the ignition spark. (As reported on Ideal Classic FF 330)
Pick your boiler brand for the Neon SG fix
Source
Information for the Neon SG fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026