BoilerFaultCodes F.064 High
Boiler Fault Code F.064
Also written as F064 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.064 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 identified a faulty internal sensor that is preventing it from correctly measuring temperatures, causing it to shut down to stay safe. (As reported on Vaillant ecoTEC Plus 832)
Pick your boiler brand for the F.064 fix
Source
Information for the F.064 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