BoilerFaultCodes E441 Medium
Boiler Fault Code E441
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E441 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is having trouble sensing the temperature of your hot water supply, which will likely prevent it from heating your water correctly. (As reported on Navien NCB-28LDWE)
Pick your boiler brand for the E441 fix
Source
Information for the E441 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