BoilerFaultCodes Red neon on fascia illuminated High
Boiler Fault Code Red neon on fascia illuminated
Also written as REDNEONONFASCIAILLUMINATED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Red neon on fascia illuminated 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 has detected that the water pressure is too low to operate safely and has shut down to prevent damage. (As reported on Glow-worm Space Saver Compleheat 30 40 50)
Pick your boiler brand for the Red neon on fascia illuminated fix
Source
Information for the Red neon on fascia illuminated 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