BoilerFaultCodes no live supply on red lead High
Boiler Fault Code no live supply on red lead
Also written as NOLIVESUPPLYONREDLEAD — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code no live supply on red 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 start the ignition process for your heating or hot water. (As reported on Ideal Classic NF)
Pick your boiler brand for the no live supply on red lead fix
Source
Information for the no live supply on red 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