BoilerFaultCodes Neon SG1 Low
Boiler Fault Code Neon SG1
Also written as NEONSG1 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Neon SG1 appears across 1 boiler brand and 16 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 gas burner and this light will turn off automatically once the flame is successfully established. (As reported on Ideal Classic SE15P FF)
Pick your boiler brand for the Neon SG1 fix
Source
Information for the Neon SG1 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