How much does it cost to fix boiler error code Off (No light)?

Typical repair cost for the boiler Off (No light) fault is £80-250 including labour.

Off (No light) High

Boiler Fault Code Off (No light)

Also written as OFFNOLIGHT — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Off (No light) 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 is not receiving electrical power or does not realise you are asking for heating or hot water. (As reported on Worcester Bosch 28i Junior)

Pick your boiler brand for the Off (No light) fix

Worcester Bosch Off (No light) 2 models

Source

Information for the Off (No light) 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