How to DIY recharge freon - SL2 Saturn Cars & Trucks

if it has a hermetically seal unit ( fridges , cooler etc) it is not a job for a diy as it requires specialist gauges and fitting with some welding experience

How have you deemed that it is a faulty "air conditioner", and not an AC system that is just low or depleted of Freon and needs recharged? If it is truly a bad AC motor/pump, we are talking about recovering the Freon from the system, which is complicated and requires training in its own, and then replacing the physical part, and then recharging the system accurately and properly.
Typically something better left to trained professionals and not made for the DIY home mechanic.

You can not use Freon to recharge your a/c system - refrigerant 134a is required. If the system is empty, 1.75 lbs of this and 9 fl oz of PAG refrigerant oil for the HT6 compressor is required.

HOWEVER, this is not normally a DIY project. Without first checking various internal system components and properly and completely evacuating the system, you are wasting your money and you may ruin the system. There are top-up kits available, but the refrigerant/oil ratio is critical and without a full system check, using them is unwise.

My first suggestion is to be sure you're low on freon. You will need to have the system evacuated, vacuumed and than recharged. This is not for the typical DIY. However if its just a bit low you can go to the local parts store and purchase a can of freon with a gauge in it to show you when you're at a proper fill. I've been a tech for 16 yrs and they work nicely in a pinch. Hope this was helpful.

For DIY folks, you get a recharge kit from an auto parts store and connect it to one of the ports on the ac line.
Instructions come with the kit.
Keep in mind freon gas is about 30 degrees below zero coming out of the can.

DIY people can buy a kit at the parts store and add a can or two if the system is just low.
The kit is a gauge and hose that connects to one of the service ports on the ac line and takes the cans of freon.
Freon gas is about minus 30 degrees coming out of the can.

Typically the fitting on the recharge kit will only fit on the low-side line. Here is a good website that explains the recharge process:
http://milkyourmoney.com/2009/05/27/diy-how-to-recharge-your-cars-air-conditioner/

Here is a good wesite that explains how to recharge a car's ac
http://milkyourmoney.com/2009/05/27/diy-how-to-recharge-your-cars-air-conditioner/

Well the average DIY can't verify a leaking condenser.
You would need a black lite if using dye in the system or a sniffer to sniff for the freon gas.
I would get a second opinion.

look for the low level freon it;s is marked with a blue cap you should be able to add it there . there are to caps a small red and a blue one