BoilerFaultCodes E85 High
Boiler Fault Code E85
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E85 appears across 2 boiler brands and 4 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 has lost contact with its sensors or other parts, meaning it cannot receive the signals it needs to operate safely. (As reported on Baxi 600 Combi (range))
Pick your boiler brand for the E85 fix
Source
Information for the E85 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