How much does it cost to fix boiler error code Er 14?

Typical repair cost for the boiler Er 14 fault is £90-250 including labour.

Er 14 High

Boiler Fault Code Er 14

Also written as ER14 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Er 14 appears across 4 boiler brands and 24 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has safely shut itself down due to a safety lock-out, meaning it needs to be manually reset or checked by a professional before it will work again. (As reported on Biasi Advance 25C)

Pick your boiler brand for the Er 14 fix

Biasi Er 14 21 models Ferroli Er 14 1 model Johnson Starley Er 14 1 model Vaillant Er 14 1 model

Source

Information for the Er 14 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 31 August 2026