Low
S.07 on Vaillant Home System

Your boiler is briefly running its internal pump after a heating cycle to safely move remaining 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.

What the manual says

Manufacturer manual

Heating mode: Pump overrun

From this model's manual
Verified against the Vaillant Home System installation & service manual, page 32.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

No action is required as this is a normal operational status message.Ensure your radiator valves are open to allow heat to dissipate.Wait a few minutes for the boiler to return to standby mode.

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