How do you fix overflow in car AC refrigerant?

To fix overflow in a car's AC refrigerant, first, check the system for leaks and ensure all components are functioning properly. Use a refrigerant recovery machine to safely remove excess refrigerant from the system. After removing the excess, recharge the system with the correct amount of refrigerant as specified by the manufacturer. Finally, test the AC system to ensure it's operating efficiently and without leaks.