Low Information
S.7 on Vaillant ecoTEC

Your boiler is temporarily running the pump to cool itself down after a period of activity, which is a normal operation rather than a fault.

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

What causes this fault?

This status occurs when the boiler has finished heating and needs to circulate water to dissipate residual heat from the internal heat exchanger. It is a protective measure to ensure the internal components do not overheat once the burners have turned off. The boiler is simply 'catching its breath' after a period of work and will return to normal operation shortly.

DIY fix possible

Wait for the pump symbol to disappear as it usually stops after a few minutesCheck that your radiator valves are open to help heat dissipateEnsure there is power to the boiler and no other fault codes are showing

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Related fault codes

S. 0View →S. 8View →F.20View →

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