I have a 2007 Chrysler Aspen with the 5.7. My air conditioner stopped blowing cold air. When looking into the issue, I discovered that the Condenser Fan was not kicking on. I took a jumper wire and removed the relays for the fan and was able to get the fan to kick on. I tried replacing the relays, however, that did not fix the fan. I did take the High pressure sensor conector off and put it back on and restarted the car, this gave me the condenser fan on low speed until I shut the car off and turned it back on again and the condenser fan failed to turn back on.

What is going on and what should I look at?

 

My guess would be replacing the AC evaporator in the AC Unit behind the dashboard.