1993 was the last year for R-12. I’m EPA certified for auto air and can still but and use it. Have to use a recovery machine though. I have two of them, one for R-12 and one for R-134a and also a tank for each. Can’t mix them.
The only two A/C system differences is that the old condensers don’t work well for R-134a and the R-12 seals will deteriorate with R-134a. Newer seal material for 134a will work fine with R-12.
There are R-12 equivalent refrigerants out there like FR-12 that Penzoil came up with.
That’s the 609 and some in cases the 608 certification. The old condensers will work fine if sealed on all sides with foam strips as R-134a runs at slightly higher pressures than R-12. The only incapability issues are the Viton seals used in some of the older R-12 systems. It’s the PAG oils that are causing the seal and o-ring deterioration in these A/C systems.
Having R-12 taken out of an antique immaculate campervan would be nice. How does one find someone certified as you in another state? The old condenser sat for a long time and does not condense. The system has lost no R-12 (that is, it will not take a charge.
Thank you for the information. The number of BS “kits” to convert to 134a using the same system as understand it- actually ruins the system/seals ... unless mistaken.
Overall point here was the constant “environmental” push that aids industry that is large enough to be forced to change over, costing citizens billions in the changing, for the reasons of the “ozone layer” “science” which is not, again the variance is solar related. But what do the world eco-socialists care about science if it gets in the way of destroying an economy.
But other problems— Chinese based. Such as a domestic Trane unit had to change out— and guess what— a heat pump valve to change over to heat pump from a/c cooling... the Trane guy told me its-— MADE IN CHINA, and brand new does not freaking work well at ALL. O