As long as you are critiqing my posts I will offer some comments on yours. You are obviously very well trained, both formally and clinically. Your spelling is also much better. On the minus side I think IMHO you give way too much minutiae for most of the people on the List when they are looking for simple answers and are lost with much of the details that you provide. If you are trying to impress with your obviously vast knowledge just who are you trying to impress, this List? I try to keep my answers short and sweet without going into every detail. Of course that can leave out much but if asked further you can always offer deeper detail. Since you asked I AM certified, thank you. I was trying to point out that for most people A/C work is not worth the effort and investment and they would be better off giving it out. Sort of like tire balancing and alignments. Sometimes it just isn't worth it. I agree if there is a problem with the A/C a thourgh job is always better but economics always enters into the picture. If the system is just low and clean then fixing the leak and recharging is OK. Once you start replacing parts it is not always clear where to stop. In any case every time you break open a joint you take the chance of damaging it. Do you just do some "O" rings, or now do the dryer, service valves, oil, screen, etc? You get carried away and the customer pays. You always have to find some kind of balance between the type of work you want to build your reputation on and the bill you have to give the customer. Too high and they never come back. You can't turn every job into a restoration. On the subject of "Drop-In" replacements, I am using R-414, a blended refrigerent. I am getting very good results and can recomend it. It is completely compatible with all oils and seals and can even be topped off several times. In fact (although it is not recomended) you can top off an R-12 system with it. I do like to pull a real hard vacuum, say 500u for an hour so there is no water vapor. Water vapor is the big killer for any closed cycle refrigerent system, it rots it from the inside out. I doubt if a DIY is going to spend for a decent vacuum pump, reclaimer, gauges, tools, supplies, etc. It just isn't worth it for one or two cars. Now if you are going to do the neighborhood, that is a different story. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "endotex23" <endotex23@xxxx> wrote: > > > --- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@xxxx> > wrote: > > > A very good post on A/C David. You must be 609 or 608 certified. To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/