Probably leaking freon.
A bad alternator will cause a battery to go bad. It does not have an effect on the air conditioner.
Your A/C needs recharged.
Max
You have a vacuum source at the intake manifold that is possibly disconnected.
The most common cause would be low refrigerant.
It is probably a Dodge. Consider yourself fortunate that it even runs.
Compressor not running, blown fuse, low of freon.
over-charging...great way to blow up the compressor...
absolutely because if the compressor is not engaged then it can not produce cold air.
It can.
An air conditioner blows out heat
A for sale sign, then buy a diesel.