BoilerFaultCodes F08 – A08 High
Boiler Fault Code F08 – A08
Also written as F08A08 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F08 – A08 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 become too hot and has shut itself down as a safety precaution to prevent damage. (As reported on Ferroli iBoiler 24)
Pick your boiler brand for the F08 – A08 fix
Source
Information for the F08 – A08 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