BoilerFaultCodes 71 High
Boiler Fault Code 71
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 71 appears across 2 boiler brands and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped running because it senses that even though the burner is lit, the water inside isn't getting any warmer. (As reported on Alpha E-Tec Regular)
Pick your boiler brand for the 71 fix
Source
Information for the 71 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