n7 High

Boiler Fault Code n7

Also written as N7 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code n7 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's internal computer is struggling to communicate with its control sensors, preventing it from safely starting your heating or hot water. (As reported on Protherm 100EC)

Pick your boiler brand for the n7 fix

Glow-worm n7 1 model Protherm n7 1 model

Source

Information for the n7 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