Another A/C question ! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 06-06-2006, 03:19 PM   #11
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Quote:
Originally Posted by JDSeaton
Ok guys, I've tried swapping relays around and got nothing . Question : if the system is a little low in freon will it not come on at all or would it at least cycle if the relay was the issue ? I'm thinking it would at least kick on for a few seconds . I've seen on the other posts about scanning the PCM to see if it'* commanding the a/c on . Do I just need a regular OBDII scan tool for this or something else ? As always - thanks for all answers!!!
I am not sure about scanning the PCM; however the system will not run period if there is not enought freon.
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Old 06-06-2006, 04:58 PM   #12
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UPDATE! Ok , I decided to go out and disconnect positive batt. cable for a few minutes just to clear the computers mind ! When I reconnected the compressor and fans came right on. I went ahead and jumped across low press. switch and proceeded to inject freon . The frozen line began to thaw and I charge her up to about 35 . It was getting cold so I stopped . I've been told that if the lines going into and out of the accumulator are the same temp to the touch then the system is properly charged . Anyone ever heard that one ? I did put a bit of stop leak into the system and suspect I'll have to add some more but it was getting cold . I'll keep you all posted . Thanks for the help !!!
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Old 06-06-2006, 06:16 PM   #13
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I wouldn't go by the feel of the lines. You should always use a refregerant gauge when adding ref. so that you know you have the correct psi.
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Old 06-06-2006, 06:56 PM   #14
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I did use gauges . I was just told by an old timer that this is one indication of proper charging . What is the exact low pressure side charge anyway ? Thanks
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