BoilerFaultCodes 28i Low
Boiler Fault Code 28i
Also written as 28I — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 28i 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 This code is not a fault; it is an informational status message indicating that your boiler is performing its standard self-check procedure ten minutes after ignition. (As reported on Worcester Bosch 24i Junior)
Pick your boiler brand for the 28i fix
Source
Information for the 28i 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