If you did not FLUSH the system, you will be replacing AC components in the next 2 years. Many of the better AC shops also insist on changing the receiver/dryer because it is impossible to get the old R12 oil out. The R12 oil will muck up the R134a. For anyone who has NOT converted, save yourself the headaches.. Stick with R12. My only warning about R12 is, make sure you user PURE R-12 or some other high quality replacement. Make sure the blend does NOT CONTAIN propane. Yes, some R12 mixtures have Propane. I have heard of people using pure propane in systems too. Although it cools nicely, a small AC leak could be deadly! -----Original Message----- From: noflux@xxxx [mailto:noflux@xxxx] Sent: Wednesday, June 13, 2001 1:42 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: [DML] Re: A/c fixes <SNIP> The only thing I did to convert mine was chang out the charging valves (on top of the compressor)and purge and vaccum out the system SO THAT ALL OF THE THE OLD R-12 AND R-12 OIL IS OUT then rechrged it with 134a, and it seem to be just as cold as the R-12. <SNIP>