8478 High

Boiler Fault Code 8478

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 8478 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 is failing to light the flame properly because the part responsible for creating the ignition spark is not working as it should. (As reported on Vokera Maxin)

Pick your boiler brand for the 8478 fix

Vokera 8478 1 model

Source

Information for the 8478 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