Boiler Fault Code F.327

Also written as F327 — same fault.

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

Fault code F.327 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 has detected that it is set up to provide hot water to a storage tank that isn't currently connected, causing it to limit how much water flows through your heating system. (As reported on Vaillant ecoTEC plus)