BoilerFaultCodes E69-243 Emergency
Boiler Fault Code E69-243
Also written as E69243 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E69-243 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected an issue with the seal around the observation window, which could lead to unsafe gases escaping into your home. (As reported on Ideal Mini HE)
Pick your boiler brand for the E69-243 fix
Source
Information for the E69-243 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