How do you put freon into air conditioning system in your car?

To add Freon (refrigerant) to your car's air conditioning system, first ensure the engine is off and locate the low-pressure service port, typically marked with a "L" or blue cap. Attach a refrigerant can with a gauge to the port, then start the engine and turn on the AC to the maximum setting. Slowly open the can valve to allow refrigerant to flow into the system, monitoring the pressure gauge to avoid overfilling. Once the desired level is reached, close the can and disconnect it from the service port.