Originally Posted by Lethaldosage423

66and06stangs, Evacuating the system pretty much just means emptying it out.
I highly DO NOT recommend you do this but if you take off the service port cap on the AC lines there is a Schrader valve (like a valve stem of a tire) you push it down and it will spray out. ITS UNDER PRESSURE and its dangerous to your eyes, lungs, and the environment...lol...
the correct way is to hook up an air conditioning service machine. It connects to the high and low pressure lines of your AC system at the service ports and safely recovers the refrigerant.
The machines run about $4000 so your average weekend warrior mechanic will most likely not have one.

My usual opinion when it comes to servicing an AC system is to take it to a shop who specializes in AC. Reason being is it can be dangerous and if people go overcharging the system or replacing parts they aren't really sure are bad, your wasting money.


Ill type up a testing procedure for checking AC systems if you like, maybe the mods will sticky it.