Low
S.27 on Vaillant Turbomax Plus 828

Your boiler is briefly running its internal pump after a demand for hot water to safely dissipate excess heat and keep the system ready for use.

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

Pump over run (warm start)

DIY fix possible

This fault may be fixable without an engineer. Check your manual first.

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Related fault codes

S.20View →S.28View →

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