How much is a new Climate Conrol System?

you really don't realize what your are asking for: a new a/c compressor, drier, condenser, evaporator, lines and control unit. that's the system and it's more than your car is worth. what you really need is a good Volvo shop that can diagnose what the problem is. there are not a lot of them around; other Volvo owners can tell you who the good guys are.