Re: [Chrysler300] R12A

["Warren Anderson" <wranderson@xxxxxxxxxxxxx>]

  Johnnie,

  Refrigerant blends have a reported negative effect characteristic of separating in service.  So, the system ends up with some unknown mixture of chemicals. For some old clunker the resultant mixture might be just fine but for something worth keeping, where the AC system is expected to really work, original fill R-12 was and still is an excellent refrigerant. People that test and evaluate refrigerants find that the old R-12 was an excellent refrigerant with nothing developed so far that performance wise for mobile systems works as well. 

  Second choice I think is R-134A.. As this is original equipment right now and, with proper system components, does provide acceptable performance, I think it makes sense to use it for retrofits. But, things like expansion valves, receiver driers, hoses and the condenser need to be upgraded along with the compressor and the system lubricant. This I have done anf it works well.  

  New refrigerant are on the way to replace R-134A. Last I heard, the new refrigerants will not be backwards compatible. 

  Warren Anderson
  Sedona,AZ 


    
  it seems there are several products out there like R12A----but none of them are an exact substitute for R12---we are buying a 30 pound tank of R12---should be around $550---I already bought a 30 pounder that was susposed to have been around half full---it contained around 2 pounds-----thankfully I never paid that much for it--------Johnnie Slayton

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