I have had this same problem. Check your pressures, do them seem a bit high on the high and low sides? Could be an airflow issue over the readiator (mine was the radiator fan clutch went out) or could be due to an over charged condition causing the pump to not be efficient. Make sure all fans over the radiator/condensor are working (Electric and fan clutch).
Clutch possibly not engaged compressor maybe.
Could be a number of reasons. You may not have enough refrigerant. You may have a blockage in the system. The low side sensor may not be engaging the compressor clutch. The compressor clutch may be defective. You may have too much refrigerant, which causes sensors in the system to shut down the compressor. You may not have sufficient airflow through the condenser (usually due to bent fins).
No, the leak is propably the compressor shaft seal which is behind the clutch.
If it stops blowing cold air then your clutch on the compressor is probably not any good, or it could be that you need to recharge your freon and lubricant
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.
The AC clutch is on the front of the compressor where the belt rides. When power is applied to the clutch it engages to turn the compressor. It is basically a magnet a/c compressor clutch is the ound thing on the front of the compressor with pulley wheel attached. this clutch is an electro magnetic clutch that when electricity is supplied, engages so as the a/c compressor is driven ,which can then pump freon thru the ac system
Compressor not engaging possibly.
Clutch engaging/charged- (freon) I would check those things next. If you are low R12, you might have a bad o ring somewhere.
if the compressor is Running you are low on freon, if its not then you have a electrical problem
low freon, bad pressure switch, bad compressor clutch.
If the compressor is running, the blower is blowing, and there's no cold air, you need freon. If the whining is from under the hood, the compressor may be damaged. That's what happens when running without freon.
once you`ve evacuated the 22a freon,add the 134a using the adaptor provided with the kit.the compressor won`t activate when the system is low on freon.turn your ac on max with engine running add 134a,when freon pressure gets high enough the compressor will kick on.the fact that it`s not engaging would indicate a leak in the system.you can buy freon with dye in it to find the leak.once you`ve found that it`s just a matter of a new o ring usually.