BoilerFaultCodes 0001 High
Boiler Fault Code 0001
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 0001 appears across 1 boiler brand and 10 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 it is running too hot and has automatically shut itself down to prevent any damage to the internal components. (As reported on Halstead Netaheat 10/16E)
Pick your boiler brand for the 0001 fix
Source
Information for the 0001 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