Ok a buddy of mine drives a newer model Dodge Stratus (2001ish). The AC on the car has settings 1, 2, 3, and 4. Just recently it stoppped working, except pn the setting 4. What should i be looking to replace? It performs the same as the 4th setting always has, but the only problem is settings 1-3 dont work. Ideas, advice or just pointing me in the right direction would be greatly appreciated.