BoilerFaultCodes Ignition indicator (yellow) Low
Boiler Fault Code Ignition indicator (yellow)
Also written as IGNITIONINDICATORYELLOW — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Ignition indicator (yellow) 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 The yellow light simply means your boiler is currently working correctly to heat your home or provide hot water. (As reported on Vaillant Turbomax VUW 242/1)
Pick your boiler brand for the Ignition indicator (yellow) fix
Source
Information for the Ignition indicator (yellow) 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