BoilerFaultCodes 24i Low
Boiler Fault Code 24i
Also written as 24I — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 24i appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning The number 24i is a technical label referring to your boiler's power rating rather than an error message, so your boiler is likely functioning normally. (As reported on Worcester Bosch 24i Junior)
Pick your boiler brand for the 24i fix
Source
Information for the 24i 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 7 July 2026