BoilerFaultCodes E9 224 Emergency
Boiler Fault Code E9 224
Also written as E9224 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E9 224 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 switched itself off because it has detected an unsafe temperature or a blockage in the exhaust flue, preventing it from operating safely. (As reported on Worcester Bosch Greenstar i)
Pick your boiler brand for the E9 224 fix
Source
Information for the E9 224 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