There's a leak in the system somewhere.
The system can be low on refrigerant
To properly recharge it you have to have a refrigerant recovery system and gauges.
No it does not, it has to do with the cooling system of the engine and the heater. Refrigerant is used in the Air Conditioner.
low refrigerant level, possibly from leak in system
most frequent cause is the system is low on refrigerant due to a leak in the system.
The air conditioner of a Dodge Ram is powered by the rotation of the engine. It powers a compressor which circulates cold refrigerant throughout the system.
The refrigerant is for the entire air conditioner system not just for the condenser units. First, this question is not specific! There is whole bunch air conditioner condenser. Each manufacture design different condenser capacity. I might come back to this question.
AC System probably needs refrigerant added.
It came from the factory with R12 Freon. Due to the high cost of R12, I suggest you convert it over to R134. Any good A/C shop can do this. Remember, it is illegal to release refrigerant into the atmosphere. It is also illegal to add refrigerant to a system with a leak without first repairing the leak.
Refrigerant compaticilty is about suiting the refrigerant to your refrigerant system. Every cooling system has refrigerant in it which depends on the type of system you use. If the refrigerant not matches with your system, it wont work. This is refrigerant compatibility.
I have the same problem. Refrigerant is low due to a small leak in the system. They came out and added refrigerant to my system and it worked fine. Now after a long power outage (hurricane IKE) I am having the same problem. It appears I have a small leak in my system and need more refrigerant installed!