BoilerFaultCodes E85802 High
Boiler Fault Code E85802
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E85802 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 suffered an electrical failure where an internal fuse has blown, meaning the system cannot power its main components to provide heat or hot water. (As reported on Potterton Powermax HE)
Pick your boiler brand for the E85802 fix
Source
Information for the E85802 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