if you've still have freon its old! and you must retrieve the old stuff before you put in the new! I think you can get to much in and freeze up. or your compresser is out!
low on freon
the motor is going out it has freon in it but the motor is shot
If the air conditioning pump in the 1993 Chevy Z24 blows perfectly, but won't get cold, it is possible that the Freon needs to be recharged in the air conditioning unit. This can usually be done for about $40 by the consumer.
throttle positioning sensor
Its probly your fan not working right check it out okay I seem to be having the same problem. If the fan does not turn on when you turn the AC on then I believe that it is electrical problem.
The door that switches between warm air and cold air may be stuck open to the warm air side. The linkage that switches to the cold air may be disconnected or broken.
Why , they do not go bad. What is wrong with car?
Mine is out of Freon.
If you mean the fan blows but sometimes the air is cold, it probably is low coolant (antifreeze) level in the radiator. Check the level AT THE RADIATOR, not the overflow tank, while the truck is cold.
Your thermostat needs to be changed. It's about $10.00 for the part and simple to change. It's probably where the top radiator hose meets the enging block. Don't forget to boy Permatex gasket sealer and use it when you change the thermostat.
you may just be low on freon
There is something wrong with the compressor or there is no refrigerant in the system. Have it checked out. Goodluck Joe