Air Conditioner problems of the 1997 Dodge Avenger

I have had problems with the brakes since I purchased the car two years ago. I have had them repaired several times with no luck in improvement. They function fine, but feel 'soft' and they pulsate. The last time I had them fixed, the dealer replaced the pads with Chrysler pads and turned the rotors. They still did not feel they way they were supposed to feel. ** as far as the ac, when I push the button to use the ac and turn the dial to 'cold', hot air still comes out of the vents as if the heat is still on.