BoilerFaultCodes AF2 Medium
Boiler Fault Code AF2
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AF2 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that the temperature of the water used for your taps and shower has dropped too low and is activating its internal protection mode to prevent freezing. (As reported on Vokera Vibe Max)
Pick your boiler brand for the AF2 fix
Source
Information for the AF2 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