Forward Air conditioner vents no longer work - 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 04-10-2005, 08:58 PM   #1
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Default Forward Air conditioner vents no longer work

93 SE:

For some reason when I turn the air or vent on and put the selector on the forward vents, the air continues to come out the foot and defrost vents. Any ideas?
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Old 04-10-2005, 09:35 PM   #2
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Check for a disconnected vacuum line at the vacuum reservoir. It'* located betrwwn the master cylinder and the maxifuse center under the hood. If that seems fine, lower both of the front hush panels, start the car and listen for a hissing sound indicating a vacuum leak.

The climate control is designed so that if there is a loss of vacuum, the air will be directed to the defroster vents by default.
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Old 04-10-2005, 09:57 PM   #3
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what is a hush panel?
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Old 04-10-2005, 10:05 PM   #4
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Found the vacuum line that was somehow disconnected. Doesn't strike me as being very secure though - just a rubber hose that fits over a plastic nozzle. Kinda boring really :P
Still though, what'* a hush panel?
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Old 04-10-2005, 10:07 PM   #5
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(whisper) They're the panels underneath the dash. Ya know, the panels underneath the glove compartment and by the brake/acceelerator pedals.
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