How much does it cost to fix boiler error code Boiler ON (green) light off?

Typical repair cost for the boiler Boiler ON (green) light off fault is £90-250 including labour.

Boiler ON (green) light off High

Boiler Fault Code Boiler ON (green) light off

Also written as BOILERONGREENLIGHTOFF — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Boiler ON (green) light off 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 lost power completely, meaning it will not turn on or provide any heating or hot water. (As reported on Biasi Gaia)

Pick your boiler brand for the Boiler ON (green) light off fix

Biasi Boiler ON (green) light off 1 model

Source

Information for the Boiler ON (green) light off 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