BoilerFaultCodes 9A 361 High
Boiler Fault Code 9A 361
Also written as 9A361 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 9A 361 appears across 1 boiler brand and 9 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 computer components are not talking to each other properly, likely due to a software mismatch or an incorrect spare part being installed. (As reported on Worcester Bosch Junior 28i)
Pick your boiler brand for the 9A 361 fix
Source
Information for the 9A 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