BoilerFaultCodes 5 (Permanent) High
Boiler Fault Code 5 (Permanent)
Also written as 5PERMANENT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 5 (Permanent) appears across 1 boiler brand and 4 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 an internal electrical supply error or a fault within the main control board that requires a professional reset. (As reported on Ferroli Tempra)
Pick your boiler brand for the 5 (Permanent) fix
Source
Information for the 5 (Permanent) 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