BoilerFaultCodes A8 361 High
Boiler Fault Code A8 361
Also written as A8361 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A8 361 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's internal electronic 'brain' is not communicating correctly with the main control unit, preventing the system from operating. (As reported on Worcester Bosch Greenstar i)
Pick your boiler brand for the A8 361 fix
Source
Information for the A8 361 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