BoilerFaultCodes E01 074 High
Boiler Fault Code E01 074
Also written as E01074 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E01 074 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is failing to light the flame properly because it cannot communicate with the internal safety controls. (As reported on Keston K170)
Pick your boiler brand for the E01 074 fix
Source
Information for the E01 074 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