BoilerFaultCodes 762 Emergency
Boiler Fault Code 762
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 762 appears across 1 boiler brand and 4 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 flue pipe responsible for safely venting exhaust gases outside has become loose or disconnected. (As reported on Navien NCB 28 HE)
Pick your boiler brand for the 762 fix
Source
Information for the 762 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