BoilerFaultCodes E72-401 High
Boiler Fault Code E72-401
Also written as E72401 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E72-401 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 has detected an internal overheating safety trigger, which has permanently shut down the system to prevent damage. (As reported on Keston Qudos 28S)
Pick your boiler brand for the E72-401 fix
Source
Information for the E72-401 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 7 July 2026