BoilerFaultCodes ALL 06 High
Boiler Fault Code ALL 06
Also written as ALL06 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code ALL 06 appears across 1 boiler brand and 10 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected a serious internal fault that has caused it to shut down for safety reasons and it will not provide heating or hot water until a professional has inspected it. (As reported on Sime iQE Comfort 30)
Pick your boiler brand for the ALL 06 fix
Source
Information for the ALL 06 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