BoilerFaultCodes E53 High
Boiler Fault Code E53
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E53 appears across 2 boiler brands and 24 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is struggling to breathe properly because the exhaust pipe outside might be blocked or the gas is not burning correctly, causing the system to shut down for safety. (As reported on Baxi Duo-tec Combi)
Pick your boiler brand for the E53 fix
Source
Information for the E53 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