"Mikepier" wrote in message
...
Well since this might not a true dedicated CAC with the ducts probably
close to the floor, I was merely suggesting arranging the ducts in a
way that would produce optimal results. What I should have said was
adjust the ducts in a way that less cold air to the lower floors and
more to the top floors, same with the return.

But, the unit perform OK in the past. Unless the ducts/registers were
changed that does not really solve the root cause of the problem.