Correct, but on the vehicle without dual zone, there is a cool down facing blue arrow on left side of the fan control and a red up arrow on the right side of the fan control. and heat on right side. The video screen only has a control on the left side of the screen. Our jeep had both controls on left and right side of screen show up and appear to work . (Only been able to get it to show up one time, but haven't spent time trying to get it to show up again. ) I was curious if the dual zone controllers were installed would it change it to dual zone.