A08 High

Boiler Fault Code A08

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code A08 appears across 3 boiler brands and 11 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 an internal electrical safety failure and has shut down to prevent damage or unsafe operation. (As reported on Vokera Condexa Pro)

Pick your boiler brand for the A08 fix

Ariston A08 7 models Ferroli A08 3 models Vokera A08 1 model

Source

Information for the 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