How much does it cost to fix boiler error code E73?

Typical repair cost for the boiler E73 fault is £120-220 including labour.

E73 High

Boiler Fault Code E73

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E73 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 one of its internal sensors is sending incorrect information while the system tries to perform an automatic self-check. (As reported on Biasi Rinnova Adaptive Combi)

Pick your boiler brand for the E73 fix

Biasi E73 1 model

Source

Information for the E73 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