The ac is blowing cold air out of the defrost vent when the a/c is turned on.

Hello, there is a mode door motor that may not be directing airflow to the proper location. On this vehicle, this door motor is vacuum operated. The fix could be as simple as reattaching or repairing a rubber vacuum hose. Some exploration of the area where the motor is and the connected hoses is in order. For hands on help near you: https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.