BoilerFaultCodes AL 00 Low
Boiler Fault Code AL 00
Also written as AL00 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AL 00 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is displaying the most recent fault code it recorded to help you diagnose a past issue, rather than indicating a new active problem. (As reported on Sime Mia 30)
Pick your boiler brand for the AL 00 fix
Source
Information for the AL 00 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