How much does it cost to fix boiler error code E761?

Typical repair cost for the boiler E761 fault is £150-250 including labour.

E761 Medium

Boiler Fault Code E761

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E761 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 having trouble detecting the temperature of the water reserved for your hot water system, which may prevent it from heating your taps correctly. (As reported on Navien NCB 28 HE)

Pick your boiler brand for the E761 fix

Navien E761 4 models

Source

Information for the E761 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