air vents

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air vents

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air vents - 7/14/2008 4:50:56 PM

phillipiruss

Posts: 1
Joined: 7/14/2008
Status: offline

i have a 99 3.8 and my upper vents dont work. i have air at the floor board. i changed the switch and the vacuum line leading out to the hood but dont know where to look next.

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RE: air vents - 7/14/2008 7:54:17 PM

z28pete

Posts: 5575
Joined: 8/7/2005
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The air is directed to different places my moving the air doors inside the HVAC plenum. The motion of the air doors is controlled by vacuum powered actuators/motors.

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RE: air vents - 7/17/2008 8:21:12 PM

t9ojetpilot

Posts: 504
Joined: 2/23/2007
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the doors are controlled by vacuum and more than once ive found the vacuum supply lines or the tee/one way valve at the firewall to have broken. id check this stuff first kurt

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RE: air vents - 7/18/2008 12:08:08 AM

MadMikeZ28

Posts: 4182
Joined: 7/15/2006
Status: offline

Do you have defrost? If yes then you could suspect no vacuum. Defrost is a default so you will always have if for safety. If no defrost then maybe some thing could have also fallen in through the vents and jambed a door.

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