BoilerFaultCodes F.764 High
Boiler Fault Code F.764
Also written as F764 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.764 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 connected to another unit that is reporting a problem, which is preventing your system from working correctly. (As reported on Viessmann Vitodens 222-F B2TF)
Pick your boiler brand for the F.764 fix
Source
Information for the F.764 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