How much does it cost to fix boiler error code E762?

Typical repair cost for the boiler E762 fault is £120-250 including labour.

E762 High

Boiler Fault Code E762

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E762 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 is struggling to detect the exhaust vent, likely because the flue pipe is not fitted securely or is the wrong size for your home. (As reported on Navien NCB 28 HE)

Pick your boiler brand for the E762 fix

Navien E762 4 models

Source

Information for the E762 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