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Re: Freeze 12, R12 replacement? (long)
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Posted by Kevin (more from Kevin) on Thu, 8 Jul 2004 03:59:03 Share Post by Email
In Reply to: Re: Freeze 12, R12 replacement? (long), scott batchelder, Wed, 7 Jul 2004 18:19:17
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I have found that three cans is one too many. The gauges actually show perfect numbers at two cans, with 40 degrees for a cooling temperature. 30 degrees is mentioned in another post....that isn't what you want. Your evaporator will freeze up in a short while. I have used R12A from Fox tool supply. It also works very well. Better than 134. However, unless you do all your own work, or buy extra cans (you'd still have to find someone willing to use this proffessionaly), your better off going the 134 route.This year I've done three conversions with 134. No problems, except one had an odd temp sensor issue that is now OK. Most important things are pulling a good vac, and avoid over charging with both refridgerent and more commonly oil. Most people have the habit of adding twice the amount of oil(or more!) the system needs. It wouldn't work well with R12 if it was over oiled. By the way, all these Maxi-cool AC additives promissing 10% better cooling are simply compresser oils, so if you add these, you need to remove oil first.

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