H E Low
Boiler Fault Code H E
Also written as HE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code H E appears across 2 boiler brands and 9 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is displaying an 'H' and 'E' sequence to indicate its current operating status or a diagnostic mode, often triggered by a system reset or power-up. (As reported on Evo HE 12)
Pick your boiler brand for the H E fix
Source
Information for the H E 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