Low
d.01 on Vaillant aquaPLUS

Your boiler is continuing to circulate water after heating has finished to safely cool down the internal components.

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

Water pump over run

DIY fix possible

Wait for the timer to finish as this is normal operationCheck that your room thermostat is not set too highEnsure radiator valves are open to allow water flow

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Related fault codes

d.00View →d.02View →S.07View →

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