BoilerFaultCodes E78-210 High
Boiler Fault Code E78-210
Also written as E78210 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E78-210 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's burner is failing to ignite or stay lit, meaning your heating and hot water will not work until a professional resolves the issue. (As reported on Potterton Kingfisher MF RSL)
Pick your boiler brand for the E78-210 fix
Source
Information for the E78-210 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