Flame indicator (yellow) Low

Boiler Fault Code Flame indicator (yellow)

Also written as FLAMEINDICATORYELLOW — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Flame 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 This light simply shows that your boiler has successfully ignited and is operating normally. (As reported on Vaillant Turbomax VUW 242/1)

Pick your boiler brand for the Flame indicator (yellow) fix

Vaillant Flame indicator (yellow) 1 model

Source

Information for the Flame 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