Yes it´s blowing air in AC mode.

I was thinking of the vale under the dash on the passenger side.
But how do I check that?
I have checked that the actuator wire is moving whit the heat switch and it moves. but could it be some internal leak in it?

http://www.moparmall.com/Heater-Water-Valve-for-1960-1966-MoPar-C-Body-Im-p/816-xxx.htm

Thanks