030 High
Boiler Fault Code 030
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 030 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 failed to ignite or has lost the flame during operation because it is not receiving a consistent supply of gas. (As reported on Navien NCB-28LDWE)
Pick your boiler brand for the 030 fix
Source
Information for the 030 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