There should be appx 15*-20* difference between return and supply air temps measured at the unit (not the registers).
It depends on how cold you want the area that your using the air conditioner on.
try 78 degrees when cold
If it does blow just not cold air you should see if it needs to be recharged
Yes It should be cold and sweatting
You will hear air circulating in the cold air return (or return air grille) when the heater or air conditioner is running.
Portable air conditioner will not blow cold air. What to do?
When using an air conditioner, cold air comes out of the unit and into the room to cool it down.
Well the main reason why your car blows out cold then hot is because the air conditioner may not be working properly. You should go to the car shop and get it fixed.
An air conditioner blows out heat
If your air conditioner blows air but it's not cold air then you probably need freon in your air conditioner
straight from the vent should be around 47 degrees
Coming out of the vents around 43 degrees