BoilerFaultCodes A36 High
Boiler Fault Code A36
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A36 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 the exhaust gases leaving the unit are dangerously hot, so it has safely shut itself down to prevent damage. (As reported on Ariston Bravo 24 MFFI)
Pick your boiler brand for the A36 fix
Source
Information for the A36 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