BoilerFaultCodes DEMAND NEON Low
Boiler Fault Code DEMAND NEON
Also written as DEMANDNEON — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code DEMAND NEON appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is working correctly and is currently receiving a request from your thermostat or taps to provide heating or hot water. (As reported on Halstead Hero)
Pick your boiler brand for the DEMAND NEON fix
Source
Information for the DEMAND 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 27 April 2026