How much does it cost to fix boiler error code B LED 1?

Typical repair cost for the boiler B LED 1 fault is £120-220 including labour.

B LED 1 High

Boiler Fault Code B LED 1

Also written as BLED1 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code B LED 1 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has lost all power and is completely shut down, likely due to a blown internal fuse or an issue with your home's electrical supply. (As reported on Ferroli Arean)

Pick your boiler brand for the B LED 1 fix

Ferroli B LED 1 2 models

Source

Information for the B LED 1 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