How much does it cost to fix boiler error code E85 802?

Typical repair cost for the boiler E85 802 fault is £100-200 including labour.

E85 802 High

Boiler Fault Code E85 802

Also written as E85802 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code E85 802 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 stopped working because an internal electrical fuse has blown, causing the system to lose power to its controls. (As reported on Potterton Promax 15 & 24)

Pick your boiler brand for the E85 802 fix

Potterton E85 802 1 model

Source

Information for the E85 802 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 7 July 2026