This is kind of a loaded question. Freon, as it is called, is what is also referred to as R-12. The production of R-12 in the United States ceased as of January 1st, 1996. The boiling point of R-12(which is the standard of measurement), is about 26-29 degrees below zero, which means it can carry away more heat than R 134A, which is now the industry standard. The boiling point of R134A is about 16-19 degrees below zero, which means it cannot carry away as much heat as R 12, but it also does not destroy the Ozone layer in the atmosphere(due to R12 being a CFC, or Chlorofluorocarbon). Hopefully this answers the question adequately.
Check freon charge.
Yes. Freon is for keeping the AC cold
There are a few reasons your AC might not get very cold even though the Freon is fine. You could have a leak in your line.
all i know is that freon is put into air conditioning units in your car. it's what causes your A/C to be cold
Yes, refrigerators require a refrigerant like freon to function properly. Freon is used to cool the air inside the refrigerator and keep food cold.
Freon itself if not cold. Freon can be used to cool things by compressing the gas and then letting it expand. When a gas expands, it cools down (for more information about that, look up the Ideal Gas Law). Freon is very effective for this purpose and because it is a gas with a high heat capacity. Any gas can cool thing in the same way, but Freon does it particularly well. Unfortunately it is what is called a CFC, which destroys ozone in the atmosphere.
Freon is an invisible gas and cannot be seen in the air. If Freon in leaking from a container in large enough amounts and is cold enough, you may notice the condensation of moisture due to the low temperature.
You coud be leaking freon. Or the level of freon in the car could be low or shot. Best thing to do is to go get it checked, and get it refilled. Freon is what makes the air cold. Not sure what type of freon your car requires. Some you have to have a license to use, others you can purchase at your local auto parts store. -Allen
Freon is the chemical that is used to make refrigerators and freezers cold. It is extremely dangerous if consumed or breathed in for long periods of time. The symptoms of Freon poisoning include dizziness, fainting, and headache.
When your air conditioning isn't cold
you would need to add freon
Look to see if the compressor is running when the ac is on. If not, then check the Freon pressure, as the compressor won't run if the Freon is low.