BoilerFaultCodes 226 Low
Boiler Fault Code 226
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 226 appears across 1 boiler brand and 13 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has logged a note that a technician's diagnostic tool was plugged in while viewing the error history, but this itself is not a functional breakdown. (As reported on Worcester Bosch CDi Classic)
Pick your boiler brand for the 226 fix
Source
Information for the 226 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