Low Information
S.07 on Vaillant Thermocompact

Your boiler is currently running its internal pump to cool down the system after it has finished heating your home or 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

Pump over run (heating operation)

What causes this fault?

This occurs when the boiler has finished its heating cycle and needs to move heat away from the internal heat exchanger to prevent overheating. The system keeps the pump running for a short period to circulate the remaining hot water into the pipes. It is a normal safety function rather than a mechanical failure.

DIY fix possible

No action is usually required as this is a normal operating status.Wait for 5-10 minutes for the 'S' status to clear automatically.Ensure your radiator valves are open to help the heat dissipate.

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Related fault codes

S.00View →S.08View →

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