Most commonly, the system is low on freon.
you most likely have to change the front hubs with the speed sensors i have tried everything else
No it dosen`t
The cycle switch not engaging the Compressors clutch
The compressor is coming on because you have the heater set to defrost. Take it off defrost and the compressor will not come on. I would suspect the compressor is locked up.
To change out the ac compressor on your 1984 Chevy Celebrity: 1. If there is any freon or pressure left in the system you should have a professional empty the system. 2. Remove the hose off of the back of the compressor. Plug the openings to keep dirt out. 3. Loosen the adjusting bolt and slide the compressor over and remove the drive belt. 4. Remove the bolts and the compressor will come out. Reverse the procedure to reinstall the compressor unit.
It depends. If the system is low on refrigerant then the compressor will not run until there is enough refrigerant to satisfy the low pressure switch. As you add refrigerant the compressor will cycle until enough is in the system to keep the compressor running continuously. A 1lb. can of R-134a costs about $6.00. It's worth a try. Might be enough to keep you running all summer depending on the size of your leak.
maybe you have low oil pressure?
Assuming the heater works fine, you have a short, probably in the AC compressor clutch.
Low coolant or bad sensor
it comes on when you need gas
The most likely reason the compressor is not coming on is because you are low on freon. The low pressure switch will keep the compressor from cycling on because damage to your compressor would result. You can jumper across the low presure switch with the engine running and A/C turned on, ( for short time only) this will provide you with question is my compressor clutch good, or am I just low on freon. The AC compressor relay switch may need to be replaced
That won't keep the car from starting, but will keep the A/C compressor from running.