"Morgans" wrote:

"James Robinson" wrote

Certain types of Freon are. Those types are no longer used in new
air conditioning or refrigeration systems. Older systems will still
have them, but you can't replace lost fluid if you have a leak.

Where did you hear that? That must have been nonexistium that the AC
technician put in my AC at home this spring. G

The old stuff is still available, but it costs more than the new
stuff, and must be used by licensed tecs, and must be pumped out and
recovered when conditions demand that it be removed from the system.
I think I heard that the old stuff is not being manufactured anymore,
but that the existing stockpiles will last for a few more years, but
I'm not at all sure about that.

I assumed it was gone by now. They stopped making CFC-12 about 10 years
ago, and the only stocks were from what was drained from existing cars,
plus whatever stocks where in place when production ended.

You can also replace CFC-12 with other types of Freon. (like HFC-134a)
The replacements aren't quite as effective in older systems as CFC-12.