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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 04-01-2005, 07:19 PM   #1
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Default Climate Control Problems

Hey everyone,
My grandfather'* '95 bonneville with 120,000 miles started having problems with the ac system. First, air only blows onto the windshield. The switch that controls air flow seems to work fine because it turns the system on and off, and turn the ac compressor on and off on the correct positions. I suspect that the problem lies with the thing that actually sends air into the right place, maybe a motor or something. The second issue is that the ac compressor started making a medium pitch growling noise when its on. No noise when the compressor is off. Could it be the bearings, or is this soemthing normal? Thanks in advance for any help.
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Old 04-02-2005, 05:14 PM   #2
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Check for a disconnected vacuum line at the vacuum reservior between the master cylinder and maxifuse box under the hood. With no vacuum source, the climate control defaults to defrost.
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Old 04-02-2005, 08:08 PM   #3
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Compressor noise sounds like bearing.

I'll second randman1 on the vacuum hose.
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Old 04-02-2005, 11:55 PM   #4
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Awesome, thanks a lot for the vacuum hose idea. I'll check it out on Monday. How hard is it to replace the compressor. I'm sure I can take it off with no problem, but i'm not sure how the 2 hoses come off. It looks like they go into some sort of a round fitting, but there are no nuts or bolts that I could see.
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