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 05-02-2004, 01:21 PM   #11
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Not real sure about the 92'*, however, there may be a pressure switch/sensor that provides input to your PCM which enables drivers for A/C clutch relay pick up. Pressure sw. maybe faulty? (clutch permissive interlock)
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Old 05-02-2004, 05:23 PM   #12
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Thanks for the response. I checked the pressure cycling switch connection and fixed a cracked vacuum line.I also took a look at the evaporator core, which looked relatively clean. Finally, I tried disconnecting the positive terminal of the battery.

When I restarted the car, the compressor immediately engaged and it cooled down very well. I'm not exactly sure why this happened, but my hunch is that the climate control was reset because of the battery disconnect.

This was my first post after recently finding this site. The information available here and the experienced advice are incredibly helpful. Thanks again.
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Old 05-03-2004, 11:38 AM   #13
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Is it pretty expensive to have the R12 ac up, or did you have it coverted? how expensive is it?
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Old 05-03-2004, 12:26 PM   #14
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Quote:
Originally Posted by morsmortis
Is it pretty expensive to have the R12 ac up, or did you have it coverted? how expensive is it?
The Freon itself, last I checked (last year), was going for somewhere around $65/pound, although the service place I used was measuring it out in ounces, as they should, so in other words I didn't have to pay for some jerk trying to round up to the next full pound on the bill.

I had mine recharged with R12 as I had just installed a new evaporator myself, and the rest of the system was intact and in very good shape, so it seemed like a safe bet and allowed me to keep the car all original. But if you're paying somebody retail repair prices (with labor) to have a new evaporator/condensor/compressor/other component installed, and you're not sure when the next part'* going to fail and leak stuff all out again, I would suggest having the system converted to R134a now.

That way, if disaster strikes and you lose it all, the replacement refrigerant will be cheap, and further down the line, you can do your own routine spring topping-off recharges yourself with over-the-counter R134a kits.
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Old 05-10-2004, 12:46 AM   #15
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The low freon code is unique because it is stored in the PCM, not the HVAC, so it must be cleared by resetting the PCM... And that is done by disconnecting the battery for a few minutes. Looks like you figured it out.
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