BoilerFaultCodes 4250 Emergency
Boiler Fault Code 4250
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 4250 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 has detected an issue with the pressure relief mechanism, which is a safety device designed to release excess water if the system pressure becomes too high. (As reported on Vokera Maxin)
Pick your boiler brand for the 4250 fix
Source
Information for the 4250 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