BoilerFaultCodes E051 Emergency
Boiler Fault Code E051
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E051 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 has detected a blockage or restriction in the flue pipe that is preventing exhaust fumes from escaping safely at high power. (As reported on Vokera Pinnacle System)
Pick your boiler brand for the E051 fix
Source
Information for the E051 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