A/C Problem - help is appreciated - 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 04-19-2004, 07:55 AM   #1
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Default A/C Problem - help is appreciated

Hi All..looks like a great forum, hope someone can help.

I just picked up a 97 Bonneville SE with 60K miles. Extremely clean well maintained car. Love the way it rides. The problem I have is the A/C. The previous owner had no problems with it (freind of mine...I believe him). Was working at the end of last season. Heres what is happening:

1. Compressor turns on when the A/C button is pushed
2. Ambient air blows through the vents, no cold air
3. I pushed one of the schrader valves and no freon came out... looks like the system is dry
4. When the a/c button is pushed I hear a sound.. almost like a power steering whining sound inside the passenger cabin. Goes off when the switch is pressed off. I did this also with my head under the hood of the car, but it the sound does not seem to be coming from the engine compartment, but only inside the car.
5. All lines that I could see appear dry
6. I took the black cowl off and ckd the accumulator ( the silver canister) and that looked clean
I was going to purchase a manifold kit today and try putting some freon in, but I think that will not fix the problem. Does anyone have any suggestions for what it may be? And why is the compressor going on if the system has no freon?

Thank you for any help.
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Old 04-19-2004, 09:08 AM   #2
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The system may be low, but not out. Then the compressor may still come on, just more briefly. You can also hear the compressors whine sometimes when the system is low. You can add freon, but it won't fix the leak.

My recommendation would be to take it to a reputable A/C shop that has experience finding leaks. With the R-134a the repair bill shouldn't be too expensive.
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Old 04-19-2004, 01:28 PM   #3
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Default A/C Problem - help is appreciated

You can go to any auto parts store and buy small cans of 134a refrig. and a cheap hose/gage kit for under $20.00. If you try charging the system yourself you may be able to pinpoint the leak. At least then you will know what parts will have to be replaced when getting cost estimates.
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