BoilerFaultCodes Enn High
Boiler Fault Code Enn
Also written as ENN — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Enn 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 encountered a critical system error that has forced it to shut down to prevent damage or unsafe operation. (As reported on Keston Celsius 25)
Pick your boiler brand for the Enn fix
Source
Information for the Enn 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