1993 hvac - 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 12-20-2004, 10:28 AM   #1
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Hi. I've looked through 25 pages of posts re: HVAC and found nothing directly on point.

I have a problem in my HVAC system. In defroster mode, air flow is lower than I expect even with fan set to high. It also seems to be blowing coolant onto the windshield, as I have a constant foggy condition inside the car. The windshield fog is greasy, hence my thinking it'* coolant.

I also don't feel the airflow is sufficient while in heater mode.

I've read the posts re: air mix for temp control and don't feel THAT'* the problem. How are the doors controlled for the heat/defrost selection?

I had the heater core fixed some years back at a local dealer. Didn't they have a "Pay once and it will stay fixed" guarantee in 1998? If it'* something that should have been fixed then, I'll take it back to them. If it'* not, I'll get into it myself.

I appreciate all the help I see here, whether or not you're able to help me with this problem. You seem like a great bunch of folks who enjoy helping one another.

I'll hope to hear from somebody soon with some answers to my question.

Thanks.

Stay safe, and may God bless.

Peace.

Dan Frain
Rock Island, IL

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Old 12-20-2004, 12:10 PM   #2
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Welcome abroad. A little while ago, I had the fogging problem and coolant smell in my Grand Am. It was the heater core that had to be replaced. It could be your heater core again.
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Old 12-20-2004, 02:42 PM   #3
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I also suspect the heater core with a mild leak. Is there moisture on the floor? The airflow in mine also seems to slow down a little when I put it in defrost. I assumed it was normal, could be wrong.
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Old 12-20-2004, 02:59 PM   #4
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yea my defrost mode will leave moisture on the outside of the windshield, if the inside of the car is hot, its really weird
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Old 12-21-2004, 01:38 PM   #5
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Wait... Rock Island? I live in Galesburg.
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