BoilerFaultCodes E00 to E99 Low
Boiler Fault Code E00 to E99
Also written as E00TOE99 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E00 to E99 appears across 1 boiler brand 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 is displaying a historical log of the last ten faults that have occurred, rather than a single active error code. (As reported on Ariston Clas HE 24)
Pick your boiler brand for the E00 to E99 fix
Source
Information for the E00 to E99 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