Re: [Chrysler300] R12A

[Keith Boonstra <kboonstra@xxxxxxxxxxxx>]

I agree.  At the risk of sounding like a salesman for R-12 I will say 
that the bottom line is that nothing will be gained, but various 
negatives will likely crop up, when you make a switch from R-12 to 
anything else in an old system.  Especially R-134A.  If you don't go 
through the entire system and at least change to a higher efficiency 
condenser and barrier hose and seals - along with the proper oil - 
you're going to have problems and poor cooling.

With R-12 readily available at $350 there's really no point in 
changing.  It's still the best one they have ever come up with.  So just 
make sure all the components of your old setup are in good repair and 
charge it up with the R-12.

Keith Boonstra


  6/20/2011 9:19 PM, Warren Anderson wrote:
>
>
> 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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>
> [Non-text portions of this message have been removed]
>
> 



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