Your question will not give you the answer that you need. Until you know the reason that your A/C system is not working, it is impossible to give an estimate. I have repaired some vehicles for under a hundred dollars where it only took a O-ring or a filler valve schrader. Others take new compressors or condensers or replacement lines, there are electrical controls that also have to be considered. So to answer this question, without knowing the nature of your problem I would say some where between $100.00 and $2,000.00. Get a qualified Technician to look at it, not just a friend.
