BoilerFaultCodes E 94 High
Boiler Fault Code E 94
Also written as E94 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E 94 appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's internal computer has encountered a critical software or communication error and has safely shut itself down to prevent further damage. (As reported on Ariston Genus One 24)
Pick your boiler brand for the E 94 fix
Source
Information for the E 94 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