BoilerFaultCodes E9318 High
Boiler Fault Code E9318
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E9318 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 that the connection to the sensor monitoring exhaust fumes has been broken or lost, causing the system to shut down for safety. (As reported on Worcester Bosch GB162)
Pick your boiler brand for the E9318 fix
Source
Information for the E9318 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