How much does it cost to fix boiler error code Er15?

Typical repair cost for the boiler Er15 fault is £150-300 including labour.

Er15 High

Boiler Fault Code Er15

Also written as ER15 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code Er15 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 circulate water properly or clear waste gases, causing it to shut down to prevent damage. (As reported on Biasi Concept 400 20 1 Mfs)

Pick your boiler brand for the Er15 fix

Biasi Er15 1 model

Source

Information for the Er15 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