1990 Porsche 911 freon R12 or 134A

Tiny
DHIX
  • MEMBER
  • 1990 PORSCHE 911
  • 6 CYL
  • 4WD
  • MANUAL
  • 75,000 MILES
My car AC worked great until this summer. But I have only owned the car for 3 years. I would like to add some freon as I have been told that these older systems lose freon from older hoses and seals. My question is - can I add 134 or how do I tell what is in the system now? It still works but not as well as it used to.I have the adapter to put in 134 but I guess R12 is no longer available.
Monday, May 18th, 2009 AT 3:17 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Your R-12 system needs to be converted over to R-134a not an expert in AC just a little to survive
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Monday, May 18th, 2009 AT 3:32 PM
Tiny
DHIX
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You did not answer my question. How do I tell what is in the system now? Are the two refrigerants compatible. Can you mix them?
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Monday, May 18th, 2009 AT 6:38 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
R-12 was phasing out in 1993. Dunno how long you had it recharge or what you have done from the past to get it retrofit to R-134a. It comes with the R-12 as far as know. No they're not compatible-To tell what's inside you need to take it to an AC shop or base it on the test port fittings there's a difference.
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Monday, May 18th, 2009 AT 6:58 PM

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