BoilerFaultCodes Indicator 1 (Reset) Lit High
Boiler Fault Code Indicator 1 (Reset) Lit
Also written as INDICATOR1RESETLIT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Indicator 1 (Reset) Lit appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has switched itself off as a safety precaution because it has either detected a fault or has become too hot. (As reported on Glow-worm Hideaway 40B)
Pick your boiler brand for the Indicator 1 (Reset) Lit fix
Source
Information for the Indicator 1 (Reset) Lit 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