No Air From Vents

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Cadillac Seville / Cadillac Eldorado Forum Discussion, No Air From Vents in Past Cadillac Vehicle Discussion; I have a 1992 sts, and the vents refuse to open! the blower kicks on, you can feel a lil ...
  1. #1
    Hawkjock77 is offline Cadillac Owners Member
    Automobile(s): 1992 Seville STS
    Join Date
    Nov 2009

    No Air From Vents

    I have a 1992 sts, and the vents refuse to open! the blower kicks on, you can feel a lil bit of heat seeping from the passenger side defrost. but thats it. no open vents on any setting...

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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Woodstock Ill.

    Re: No Air From Vents

    Defrost is the default mode in case of a vacuum leak (mode doors are vacuum controlled) so you should at least have full air from there. If the blower is working, but no air from anywhere in the car, then I would guess that the HVAC housing on the firewall has gotten brittle and developed a crack or hole and all your air is escaping under the hood. Somewhat common on older cars.

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