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  1. Greetings! So I have me a 1973 Pontiac LeMans. When I bought it two years ago, the A/C wasn't working. I had my local GM dealer take a look at it. It came back to me blowing only somewhat cool air. They said something about one spot in a flow line freezing up and that I needed a new thermal expansion valve and the associated circuit breaker. Well I had no trouble finding a new TXV, but couldn't find anything online about any circuit breaker. So I took her back in to GM with the new TXV. When I got her back they hadn't installed the new TXV and were talking about not being able to do anything with it because it was an old (R13?) refrigerant system. You can tell from my description that 'what we have here is a failure to communicate.' I never had a chance to talk to the mechanic and was getting information filtered through the service rep, who really didn't have a clue. My bad for not going back and talking to the mechanic. Water under the bridge. Anyone want to guess what my options are? The local classic car auto parts guy says I need to completely change over the system and he's never seen that done for less than $4,000. My brother-in-law, who takes cars apart for a living, says all it needs is a kit with new seals and gaskets and R134a refrigerant to do the trick. I live in Canada, but it's a US-built car, if that makes a difference. Thanks for helping with my utter confusion! Gary
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