I have a '95 SC with about 170k on it and am experiencing A/C inconsistency. It stopped working back in April, and my mechanic diagnosed it as a leaking line, the front-most one ($300 to fix-ouch!). Then a few weeks ago it began doing the same thing, blowing warm, so I took it back under warranty. Well, now they tell me it's the valve in the compressor to accumulator line, which requires the whole line to be replaced at a cost of $300 for the part and $200 more for labor. I said yeah go ahead, but they had to order the part, only could find one in Las Vegas. Well I have waited for over a week, so just for kicks on Sunday, I decided to try the A/C and it worked really well all day in some pretty extreme heat & humidity. Then it stopped again yesterday, but now it's cooling today. I really doubt if a valve in one of the lines is causing the problem. Any thoughts? Thanks in advance.