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S.07 on Vaillant ecoTEC Plus 836

Your boiler is briefly running the pump after heating your radiators to safely move residual heat away from the unit.

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

Heatingmode:Pumpoverrun

What causes this fault?

This status occurs when the heating cycle finishes and the boiler keeps the pump spinning for a few minutes. It physically pushes the remaining hot water out of the heat exchanger and into your pipes to prevent the internal components from overheating. It is a normal safety function rather than a mechanical failure.

DIY fix possible

Check that at least one radiator (usually one without a thermostatic valve) is fully open to allow water to circulateWait for the code to clear automatically after a few minutesEnsure your system pressure is between 1.0 and 1.5 bar on the display

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Related fault codes

S.06View →S.08View →F.20View →

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