A06 High

Boiler Fault Code A06

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code A06 appears across 3 boiler brands and 19 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler's internal computer has detected a safety control failure and has locked itself down as a precaution. (As reported on Vokera Condexa Pro)

Pick your boiler brand for the A06 fix

Ariston A06 6 models Ferroli A06 12 models Vokera A06 1 model

Source

Information for the A06 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