n2 High

Boiler Fault Code n2

Also written as N2 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code n2 appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is not detecting that the pilot light has successfully ignited, so it has shut down to prevent gas from escaping. (As reported on Glow-worm Jaguar Combi)

Pick your boiler brand for the n2 fix

Glow-worm n2 1 model Protherm n2 1 model

Source

Information for the n2 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