BoilerFaultCodes 2F:0 Medium
Boiler Fault Code 2F:0
Also written as 2F0 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2F:0 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is currently stuck in an automated air-clearing or water-filling mode, meaning it cannot provide heat or hot water until the cycle is finished or reset. (As reported on Viessmann Vitodens 333)
Pick your boiler brand for the 2F:0 fix
Source
Information for the 2F:0 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 27 April 2026