BoilerFaultCodes F.081 High
Boiler Fault Code F.081
Also written as F081 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.081 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 lost the internal connection needed to send hot water to your separate hot water cylinder, meaning you will currently have no hot water. (As reported on Vaillant ecoTEC Plus 832)
Pick your boiler brand for the F.081 fix
Source
Information for the F.081 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