BoilerFaultCodes No LED High
Boiler Fault Code No LED
Also written as NOLED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code No LED appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has completely lost power and is not responding, meaning it cannot provide any heating or hot water until the electrical supply is restored. (As reported on Worcester Bosch Greenstar 27CDi)
Pick your boiler brand for the No LED fix
Source
Information for the No LED 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