Originally Posted by CraZyDriVer868
my car does NOT have a A/C button on it...its weird i dont know why...
The car decides whether you need A/C or heat depending on the termperature you've selected vs. the temperature it senses in the cabin (and probably also the outside temperature that it detects via a sensor under the nose).
There'* no actual "A/C" button per se; the closest thing to that is the "AUTO" button, which allows the A/C compressor to run if the car decides that it needs to. Pressing the "Manual" button keeps the compressor off (i.e. no A/C), although heater operation is not affected.