Video showing a hands on (DIY) guide to replacing a Dual Coolant Flow Valve Unit on a Jaguar S Type 3.0 2005MY. In this instance although the valve was functioning correctly it was leaking quite badly. If this condition is not attended to the result could be that the valve solenoids can draw excessive current and damage the Air Conditioning Climate Control Module (CCM) circuit board. Earlier models apparently were more tolerant to the higher currents and less likely to be damaged.

A full printable technical write-up and step by step instructions is available for download here.