BoilerFaultCodes E54 Medium
Boiler Fault Code E54
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E54 appears across 2 boiler brands and 28 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning The boiler is struggling to detect when you turn on a hot tap, which may result in lukewarm water or no hot water at all. (As reported on Baxi EcoBlue)
Pick your boiler brand for the E54 fix
Source
Information for the E54 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