0A8 High

Boiler Fault Code 0A8

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 0A8 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 is having trouble detecting the flame needed to heat your water, causing the system to shut down for safety. (As reported on Alpha Pro Tec Plus)

Pick your boiler brand for the 0A8 fix

Alpha 0A8 2 models

Source

Information for the 0A8 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