BoilerFaultCodes 5 (Permanent Light) Low
Boiler Fault Code 5 (Permanent Light)
Also written as 5PERMANENTLIGHT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 5 (Permanent Light) appears across 1 boiler brand and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is correctly receiving electrical power and is currently in its standard standby or operating mode. (As reported on Ferroli Tempra 12 18)
Pick your boiler brand for the 5 (Permanent Light) fix
Source
Information for the 5 (Permanent Light) 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