6.9poweredscout
Bleeds IH red...
I'm assuming the blend door is connected to that vacuum actuator on the heat/AC box under the hood correct? Now I've never had a issue with heat or AC and the fan blows good on all settings. I did the heater hose vacuum actuator valve to help get cooler AC. Hooked it all up and switched it to max AC with the lever all the way to cool and fan on high and looked at the blend door actuator.... Didn't move. I pulled the vacuum hose off and the actuators changed positions but nothing changed in the vents. Still lots of cold air blowing. Sooooo what does the blend door do? If nothing changed opened or closed what does it mean? It's got full vacuum so I know that half works, setting it to max AC should change something right? Oh and before someone asks what vehicle from not reading my signature, it's a 1991.