this is type III system

The fan seems to blow well as it is supposed to on high, modulated, and low fan speed settings

Ducts do not open and close on que, only puny amount of air flows through any of them, it is warm but so little air flow its not heating well

The mono valve has a new plunger in it so it seems to permit flow of hot coolant as necessary,

I have verified the proper vacuum energy is being fed across the firewall to the proper tube feeding the complex of switchover valves

I have taken the ACC controller box apart and inspected the circuit boards, and do not see any broken solder joints

Since the switchover valves routing vacuum to duct actuators are controlled by electrical circuits, that seemed like the first thing to look for , defective vacuum delivery to the actuators would start there.

I am really really resisting taking the dashboard out . Big time. Seems like removing the dash is the only way to get good access to all those actuators