Low
Ignition indicator (yellow) on Vaillant Turbomax VUW 242/1

The yellow light simply means your boiler is currently working correctly to heat your home or provide hot water.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

Technical description

Illuminates when gas valve, operator and ignition transformer are energised. This indicator remains on during burner operation.

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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