I learned something today Thanks for the link, Jim. I still use r-12 in mine. Now that I know that little trick with the expansion valve, I just might try that 134 stuff the next time. One thing I would like to add, a/c flush is a waste of money. I used to be an a/c guy back when r-12 was about $1 a pound. Mineral spirits is cheaper and works well. I use a flush gun from JC whitney that cost me about $50. You just need compressed air to blow things out when you're done. :Smarty:
