QuestionQUESTION: 91 fleetwood caddy. the "service a/c light" keeps coming on when using the "auto" feature. The repair place has checked: fuses, drained old freon added new freon, has no leaks. When battery was replaced and pc recet the a/c blew cold air for 10 mins then quit, light came back on. Took it back to where i bought it, they said the compressor is good it is blowing air but not cold air. After putting new freon in it, it worked 15 mins with cold air shut off to "econ" and light came back on. What could be going on?
ANSWER: What type of freon did they install ?. R-134 ?.
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QUESTION: I do not know, I know they used the freon that the dealer uses. The mechanics all own cadillacs
ANSWER: I need to know what type was used.
If they used R-134 freon it will NOT work in your vehicle as your year of vehicle uses R-12 freon.
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QUESTION: it was converted to r-134 so that is the freon they used.
AnswerYou CANNOT convert an R-12 Cadillac system to R-134 freon because the low pressure sensor is NOT calibrated to be used with R-134 freon and what you are experiencing will happen every time you try and put R-134 freon in a Cadillac system which is designed designed for R-12 freon.
You have NO CHOICE but to go back to R-12 freon. As to date, There is no conversion methods available.
If you would like, You can ask the best qualified experienced Cadillac person that I know of by e-mailing him at: onlineautohelp@msn.com
