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Refrigerants 414 & 419?

Picked up my room AC unit from my refrigeration guy and got him talking about automotive AC's.

Told him I am putting together the system in my '84 244GL and would he draw a vacuum on it once I am ready.

"What kind of refrigerant will you be using?" he says. "Don't tell me 134a"!

"I am thinkng about Freze 12. Ever hear of it?" says I.

He then proceeds to tell me about R414, which he recommends, or R419 which he says is "like R12"

"Freeze 12 probably has benzene in it and you can overcharge and cause an explosive situation."

Then he hands me a sticker for his favored R414 and it reads "Hot Shot"

Now, I don't know what to use, but will probably go with the Freeze 12, because many here are having success.

Any comments?







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