BoilerFaultCodes E480 High
Boiler Fault Code E480
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E480 appears across 1 boiler brand and 7 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's hot water sensor has stopped sending a signal, which means it cannot tell how hot the water is and has stopped heating it to prevent overheating. (As reported on Navien LCB700)
Pick your boiler brand for the E480 fix
Source
Information for the E480 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