BoilerFaultCodes E 23 Emergency
Boiler Fault Code E 23
Also written as E23 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E 23 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's fan is not spinning fast enough to clear waste gases safely, so the system has shut down to prevent a safety hazard. (As reported on Chaffoteaux Minima HE)
Pick your boiler brand for the E 23 fix
Source
Information for the E 23 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