How much does it cost to fix boiler error code Er 01?

Typical repair cost for the boiler Er 01 fault is £100-280 including labour.

Er 01 High

Boiler Fault Code Er 01

Also written as ER01 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Er 01 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 tried to light several times but failed, so it has shut itself down for safety. (As reported on Biasi Advance 25C)

Pick your boiler brand for the Er 01 fix

Biasi Er 01 1 model

Source

Information for the Er 01 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 27 April 2026