How much does it cost to fix boiler error code 15E?

Typical repair cost for the boiler 15E fault is £150-300 including labour.

15E High

Boiler Fault Code 15E

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 15E 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 is struggling to move water around the system properly, which is causing it to overheat and shut itself down for safety. (As reported on Biasi Concept 400 20 1 Mfs)

Pick your boiler brand for the 15E fix

Biasi 15E 1 model

Source

Information for the 15E 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