BoilerFaultCodes Fan rpm not exact High
Boiler Fault Code Fan rpm not exact
Also written as FANRPMNOTEXACT — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Fan rpm not exact appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is unable to start or stay on because the internal fan is not spinning at the correct speed to safely clear away exhaust fumes. (As reported on Biasi Riva Advance M96.24SM)
Pick your boiler brand for the Fan rpm not exact fix
Source
Information for the Fan rpm not exact 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 27 April 2026