There are 2 ports covered by plastic caps (one high pressure, and one low pressure) you need to be careful when handling freon as it can cause freeze burns and even blindness if sprayed in your eyes. You need to know what you are doing or you can harm the ac unit or yourself.
You call a licensed contractor and have them check your system. If they determine that it needs freon, they can add the right punt.
How many pounds of freon does it takes to full the A/C system on a Mack truck CH 613_2004
Freon is added in the low pressure port of the ac system. It is on an aluminum pipe on the passengers side, close to the ac drier.
By buying an AC charge hose and a can or 2 of R134a freon (depending on how much your car needs) Attach hose to the low pressure side & charge system. Do not overcharge, or you may destroy the AC system.
The 1994 for Ranger pickup truck air conditioning system has a Freon capacity of five pounds. The air conditioning Freon should never be overfilled.
Because they no longer use freon.
The low pressure switch will do that when the system is low on freon.
Use a freon gauge and freon refill can. Connect the gauge to the low pressure ac port of the 2003 Stratus. With the engine running and ac on high, fill the system until the gauge shows full.
You add freon to the low side fitting,top front,on the ac compressor
Remove the freon from the ac system and release the pressure on the 2001 Dodge. Loosen the fittings on the dryer and remove it. Install a new drier, and new o rings. Pull a vacuum on the system then fill with new freon.
Freon is added into the low side port of the ac system. It should be located on the passenger side of the engine visible on an aluminum pipe.
Freon is added through the low side ac pressure port. Connect the hose from the gauge and Freon and allow Freon to fill the system until the gauge shows full. The engine and ac need to be running during this process. Make sure to follow all directions on the Freon can.