BoilerFaultCodes AL 92 High
Boiler Fault Code AL 92
Also written as AL92 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AL 92 appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has shut down because it cannot balance the air and gas mixture properly while running at its lowest power setting. (As reported on Sime Mia 30)
Pick your boiler brand for the AL 92 fix
Source
Information for the AL 92 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 7 July 2026