BoilerFaultCodes E85740 High
Boiler Fault Code E85740
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E85740 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 issue with the sensor that confirms the flame is safely lit, causing the system to shut down for safety. (As reported on Potterton Powermax HE)
Pick your boiler brand for the E85740 fix
Source
Information for the E85740 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