BoilerFaultCodes D4271 High
Boiler Fault Code D4271
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code D4271 appears across 1 boiler brand and 2 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 that the water is heating up too quickly or isn't circulating properly, causing it to shut down to prevent overheating. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the D4271 fix
Source
Information for the D4271 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