Boiler Fault Code F.585

Also written as F585 — same fault.

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

Fault code F.585 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 has identified a minor fault with an external room temperature sensor for one of your heating zones, so it is simply ignoring that sensor and running based on its own internal temperature settings instead. (As reported on Viessmann Vitodens 222-F B2TF)