How much does it cost to fix boiler error code E086?

Typical repair cost for the boiler E086 fault is £120-350 including labour.

E086 Emergency

Boiler Fault Code E086

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E086 appears across 1 boiler brand 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 has detected a blockage in the flue pipe that is preventing waste gases from safely exiting your home. (As reported on Vokera Evolve)

Pick your boiler brand for the E086 fix

Vokera E086 4 models

Source

Information for the E086 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