A method of controlling an air conditioning system of a vehicle, the air conditioning system comprising at least one compressor driven by a first drive source or a second drive source, or a combination thereof, an evaporator operationally connected to the at least one compressor via a refrigerant circuit, and a blower for dispensing air into an interior of the vehicle via the evaporator, wherein the blower is driven by the first drive source or the second drive source, or a combination thereof, the method comprising the steps of:
- driving the at least one compressor and the blower via the first drive source when a temperature of air dispensed from the evaporator is greater than a first predetermined temperature and a speed of the vehicle is greater than a predetermined speed;
- and
- deactivating the at least one compressor and driving the blower via the second drive source when the temperature of air dispensed from the evaporator is greater than a second predetermined temperature, the speed of the vehicle is less than the predetermined speed, and a voltage of a power source of the second drive source is less than or equal to a predetermined voltage.