.


A SIMPLE TEST to know what way the coolant flow is, is to set ANY cold crossfire car A/C head to full cool, then start/warm up the car. After it is warm, have someone move the dials to all heat and feel which side gets hot first. The side (single line) should get hot first then it will travel over to the two duovalves coming out of the firewall on the passenger side (LHD). If I remembered correctly from years ago, the supply is the single line side, the return is the two going to the duovalves.

If it isn't right, please clarify for me here?


.