How much does it cost to fix boiler error code Er 02?

Typical repair cost for the boiler Er 02 fault is £120-250 including labour.

Er 02 High

Boiler Fault Code Er 02

Also written as ER02 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code Er 02 appears across 2 boiler brands and 8 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 that it has become dangerously hot and has automatically shut down to prevent damage or overheating. (As reported on Biasi Advance Plus 16S 25S 30S)

Pick your boiler brand for the Er 02 fix

Biasi Er 02 7 models Johnson Starley Er 02 1 model

Source

Information for the Er 02 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