AC not cold on 93 Buick Regal Custom 3.8l

It depends on the problem. Either you don't have enough air passing thru the evap core, or the level of freon is not right, or there is a restriction in the ac lines.
A mechanic would use a set of pressure gauges to check freon flow.

Does the system have a leak? If it does, then the computer might have set a low freon code that usually does not turn on the check engine light by itself. If this occurs, the code will have to be erased before the compressor will run. The computer does this in order to protect the compressor so that it cannot run without enough freon in the system. Once you correct the amount of freon in the system (if it needs it), reset the system and see if the compressor will run. Some parts stores have the ability to erase codes and will usually do it for free. I hope this solves your problem. It's definitely not good to have AC problems this time of year. Thanks for trying Fixya.com.

If you have to ask that question, you don't have the equipment, (gauges, etc) to be able to safely recharge your AC circuit in your 1993 Buick Regal!

Sorry to be blunt, but you could cause more problems than you would fix if you try to do it yourself.
Do you know what freon is in the system now? You have to recharge with the same type and since you have an older car you probably have old type in it, which means you have to evacuate the system and capture the freon (and dispose of it) and then recharge with the right amount of new type freon.

have you had it recharged with freon lately

The ac compressor has a clutch on the front end where the belt pulley runs. When the ac is off the clutch disengages and the compressor stops running. The pulley will continue to turn with the engine. If the belt is running normally and that pulley is turning normally along with the other accessories on the belt, it may not be broken, just that the clutch is disengaged. If it is still in place and spinning then your clutch is probably not broken, but more likely you are low on freon. When the freon is low a switch tells the compressor not to come on, and only the pulley will turn. Your ac will not get cold. There may also be other reasons the clutch won't pull in, such as fuses and such.

I had the same problem with my LeSabre. I took it to a mechanic and he found nothing wrong. Said it was an old car and things like that go out. I took it to a local ac repair shop. Turns out that the ac needed recharging. Anytime the freon is low, the ac compressor will not engage, to prevent the compressor from burning up. Freon contains oil that lubricates the internal parts of the compressor. Have the system checked to find out if a simple recharge is needed.

you would need a new a/c pump, however you you didnt want to replace it and could live with out the a/c, a cheaper option is to replace the belt and bypass the a/c. Most auto parts store will sell you a belt of the correct dimensions if you tell them you wish to bypass the a/c. I've done this for many customers. It can be done on just about any motor.

Best of Luck.....

can you drive your 1994 buick regal without the a/c compressor on your main drive belt. if so how?

Actually there is a evaporator tempature sensor that has gone bad that is causing it to freeze up like that because it cycles the compressor on and off to prevent this freezup and vwhen the sensor goes badf the compressor will continuasly run all the time. $4e0.00 part.

It's low on freon