BoilerFaultCodes ALL 83 High
Boiler Fault Code ALL 83
Also written as ALL83 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code ALL 83 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 has detected that it is struggling to burn the gas cleanly and has temporarily paused its operation to prevent any build-up of fumes. (As reported on Sime Murelle Advanced HE MkII Combi)
Pick your boiler brand for the ALL 83 fix
Source
Information for the ALL 83 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