I'm here to bring this up again. I'm desperately trying to find out how the whole system works and can't quite get a full picture.
I have two minor problems, I can only get a tiny amount of air through the dash controls, and I can't turn off the front fascia flow at all. I have a feeling these are related to a similar flow control. To add to this, foot well controls work fine, I can turn that on and off fine, as that seems to be a manual control as I will note below.
My understanding from a bit of trial and error, some diagrams and the very little that the Haynes Manual has been able to shed on it:
the directional knob only directly controls the footwell direction via a cable. when turned right all the way around to the dash/windshield flow it triggers a switch on the drivers (RH) side. This doesn't seem to be doing anything in my van. I've tried to follow the cables, both in my van, and also in wreck I was able to play around in for a short amount of time, but I can't find where this second controller is that is triggered by the switch.
my heater switch work fine, I get wonderfully cold air from the aircon, and toasty hot when it's turned to heat.
Really hope someone might know. otherwise I'll have to maybe go and completely pull apart a dash board in a wreck again. that'll be boring (fun, but boring).
