BoilerFaultCodes 276 High
Boiler Fault Code 276
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 276 appears across 2 boiler brands and 5 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 water is not circulating properly through your heating system, so it has safely shut down to prevent overheating. (As reported on Navien NCM 1130HH)
Pick your boiler brand for the 276 fix
Source
Information for the 276 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 31 August 2026