AL55 High
Boiler Fault Code AL55
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AL55 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler's electronic control board has been set up with incorrect configuration settings or a missing physical connection, preventing it from operating. (As reported on Vokera Mynute 10E)
Pick your boiler brand for the AL55 fix
Source
Information for the AL55 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