92 SE heating/air conditioning - 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 03-16-2005, 05:46 PM   #1
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Default 92 SE heating/air conditioning

I just purchased this car from a friend and while driveing it home i noticed that the air flow only comes out the defroster even when i have it on the vent setting, And the defroster dosn't work very well at all and i'm wondering if anyone else has had this problem and if so how do i fix it?
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Old 03-16-2005, 05:58 PM   #2
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does this car have automatic climate control or manual, the problem may lie with your Heating and airconditioning conrtol which ever type it may be, or the "mode valve" in your HVAC system may be stuck, one other possiblity since thise items are controled via vacume, you may have a substantial vacume leak occuring between the conrol panel and actuator, if you need the block diagram of how what is conected where i could scan just that image in and post it hear,

nicky
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Old 03-16-2005, 06:03 PM   #3
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Quote:
Originally Posted by neekolas
does this car have automatic climate control or manual, the problem may lie with your Heating and airconditioning conrtol which ever type it may be, or the "mode valve" in your HVAC system may be stuck, one other possiblity since thise items are controled via vacume, you may have a substantial vacume leak occuring between the conrol panel and actuator, if you need the block diagram of how what is conected where i could scan just that image in and post it hear,

nicky
That would be a big help, And its the manual controls btw.
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Old 03-16-2005, 07:05 PM   #4
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i got the pic of the hvac block diagram for the manuel control system




i can email you the blown up one just email me at [email protected] and ill send it out.....
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Old 03-17-2005, 03:30 AM   #5
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Had that problem with a 93 SSE. The small vacuum hose that connects to the firewall about in the middle had come loose. Slipping it back on took care of the problem.
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Old 03-17-2005, 08:35 AM   #6
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I feel you... my heater vents are still stuck open... One word of warning... Good Luck getting the dashboard removed... This was told to me and I'll give you the same advice... Chiltons Guild ONLY!!! # 28200 Trust me... oh and don't waste your money on hans guilds they are CRAP!
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