Your evaporator is probably clogged up with many years worth of dust and crud. If the blower sounds like it is going full blast and the volume coming out of the vents is low and all of the actuators are working that's where I would look next. I have seen some pulled from cars which were 90%+ blocked! The air would just go around them - what little could that is. That is why the new cars with the dust filters are a big advantage...unless you don't change them!

__________________
Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz