BoilerFaultCodes no line supply on violet lead High
Boiler Fault Code no line supply on violet lead
Also written as NOLINESUPPLYONVIOLETLEAD — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code no line supply on violet lead 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 to an internal safety sensor, meaning it cannot confirm the fan is working and will not ignite for your safety. (As reported on Ideal Classic NF)
Pick your boiler brand for the no line supply on violet lead fix
Source
Information for the no line supply on violet lead 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