BoilerFaultCodes A3317 High
Boiler Fault Code A3317
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A3317 appears across 1 boiler brand and 1 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 an electrical fault with the sensor that monitors exhaust gases, causing the system to shut down for safety. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the A3317 fix
Source
Information for the A3317 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