BoilerFaultCodes E52 High
Boiler Fault Code E52
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E52 appears across 2 boiler brands and 4 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 that the exhaust gases are becoming dangerously hot, so it has safely shut itself down to prevent damage. (As reported on Keston Qudos 28S)
Pick your boiler brand for the E52 fix
Source
Information for the E52 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