How much does it cost to fix boiler error code E158?

Typical repair cost for the boiler E158 fault is £120-200 including labour.

E158 High

Boiler Fault Code E158

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code E158 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 detected a blockage or issue in the pipe that carries away internal wastewater, causing it to shut down to prevent internal damage. (As reported on Baxi BBU 45/4)

Pick your boiler brand for the E158 fix

Baxi E158 1 model

Source

Information for the E158 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