BoilerFaultCodes Green neon Low
Boiler Fault Code Green neon
Also written as GREENNEON — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Green neon appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning The green light you see simply indicates that your boiler is working correctly and the main burner is currently lit. (As reported on Potterton Ultra 2 50 DV)
Pick your boiler brand for the Green neon fix
Source
Information for the Green neon 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 7 July 2026