Not my 89. Heater AC box doors and baffles are vacuum. Heater control valve (the plastic tree) is present and vacuum opereated BUT in my year, it doesn't control flow of water to the front heater core. It only allows hot water to flow or not flow to the rear compartment heater core. Hot water (in the stock arrangement) is always flowing to the heater box.Jasen said:Wait, isn't GenI cable operated
Nice of you to make your eyes bleed, looking at all those pics, just for me to tell you mine's working fine...Jasen said:From the 2,543 crappy pictures and diagrams I looked at today I would glean that it is basically the same set up as a GenII, but is just an on/off set up.
This is why I like the internet!Jasen said:If your not getting heat, your vents aren't working as the should or you have no air flow for front and or rear heat, start here.