BoilerFaultCodes ANTI-FROST DEVICE ACTIVATED Low
Boiler Fault Code ANTI-FROST DEVICE ACTIVATED
Also written as ANTIFROSTDEVICEACTIVATED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code ANTI-FROST DEVICE ACTIVATED 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 detected that the water inside the system is getting dangerously cold and has automatically fired up to prevent the pipes from freezing. (As reported on Ariston Genus Premium)
Pick your boiler brand for the ANTI-FROST DEVICE ACTIVATED fix
Source
Information for the ANTI-FROST DEVICE ACTIVATED 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