That is true, I forgot to mention. You may not need to replace any major parts. If you lost the vacuum in the system it wont work either, you'd have to get a pro to re-do the vacuum on the system and then recharge it with freon. AND if you lost the vacuum and put freon in on top of that you'll just be wasting your money on the freon because it still won't work.
Redfire '04 V6 - K&N CAI, Divorced duals, Bama Tune, EGR Delete, Gauge cluster LED overhaul.