Boiler Fault Code N.097

Also written as N097 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code N.097 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is struggling to breathe properly because exhaust fumes are getting trapped or recycled back into the system instead of venting outside safely. (As reported on Vaillant ecoTEC Plus 832)