How much does it cost to fix boiler error code E155?

Typical repair cost for the boiler E155 fault is £150-300 including labour.

E155 High

Boiler Fault Code E155

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code E155 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 an internal communication error and has safely shut itself down as a precaution. (As reported on Baxi BBU 45/4)

Pick your boiler brand for the E155 fix

Baxi E155 1 model

Source

Information for the E155 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