030 High

Boiler Fault Code 030

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 030 appears across 2 boiler brands 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 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 31 August 2026