Low
S.24 on Vaillant Turbomax Plus 828

Your boiler is briefly firing up to pre-heat its internal water supply so that you get hot water more quickly when you turn the tap on.

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

Burner ignited (warm start)

DIY fix possible

Locate the right-hand control knob on the boiler fasciaTurn the knob fully anticlockwise to the 'Off' position to disable the pre-heat featureObserve if the 'S.24' code disappears and only returns when hot water is requested

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Related fault codes

S.20View →S.21View →S.23View →

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