DriveTime/Aeverex Sold me a lemon Hawthorne California

I purchased a Chrysler 200 from this DriveTime.  Within 90 days the vehicle overheated and the engine needed to be replaced.  Their warranty company Aeverex did replace the engine.  Less than 3 weeks later something starts clicking in the dash and the AC and Heater are not working properly.  The in network provider is not equipped to repair it and it's approved to take to the dealer.  Once diagnosed I am told that the "part" is not covered.  Clearly, if the heating and cooling systems are covered, ALL parts of said systems should be covered.  This is just bad business plain and simple!!!!