How much does it cost to fix boiler error code No lights on?

Typical repair cost for the boiler No lights on fault is £100-£350 including labour.

No lights on High

Boiler Fault Code No lights on

Also written as NOLIGHTSON — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code No lights on 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 all power and the control panel is completely blank, meaning it cannot operate at all. (As reported on Alpha FMK)

Pick your boiler brand for the No lights on fix

Alpha No lights on 1 model

Source

Information for the No lights on 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