Air conditioner on 2002 Pontiac blowing hot air, although freon is not low...also makes a clicking noise.

clutch going bad--low on freon so short cycling ---condenser lines will be hot the evaporator lines are the cold ones

If there is not enough freon in the system there are safety pressure switches in the system to prevent damage to the compressor from lack of oil. First have the system tested for leaks and repair them before adding freon. The system should be evacuated with a vacuum pump for a while to check for seal leaks and to remove moisture that will enter the system .

The compressor is probably not running. Why depends on if the system is full of freon or not.

Your low on freon, as it is running can you turn the control from cool to hot and it responds if yes the blender door is operational, and still the solution is you need freon it normal for freon to leak out 10% a year.If its never been serviced it is low

sounds like you need to have your AC serviced, alot of times the compressor wont kick on when you are low on freon.

car air conditioner blowing hot air is cause by either a leak or a clogged condenser, since it has a freon in it then it might be a case of clogged condenser but this is just a contributing factor, it is possible that the leak is small that you wont even notice that the freon is not enough for the a/c to blow cold air.

change out orifice tube and accumulator.put the system under vacum then add freon.

Have you checked to see if it's low on freon?

Low on freon

Check the pressure in the low side A/C line. My guess is the refrigerant is low and needs recharging.