Trick question—you don’t! When functioning properly, your air conditioner is not ever going to have a low refrigerant level. Why? Because refrigerant is not a fuel, and at no point in the cooling process is it consumed. It exists in a closed loop system, and is intended to be recycled over and over again.
If you have low refrigerant in your air conditioner, something is wrong. Perhaps your technician—though certainly not one of ours—improperly charged the system to begin with. Otherwise, you have a refrigerant leak. Either way, running your air conditioner with insufficient refrigerant is a recipe for trouble.
