No light indication High

Boiler Fault Code No light indication

Also written as NOLIGHTINDICATION — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code No light indication appears across 2 boiler brands 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 unresponsive, meaning it cannot provide heating or hot water until the electrical fault is resolved. (As reported on Halstead Dimplex Combi)

Pick your boiler brand for the No light indication fix

Dimplex No light indication 1 model Halstead No light indication 1 model

Source

Information for the No light indication 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 7 July 2026