Question about 1987 Cadillac Fleetwood

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Air conditioner air flow

My upper vents stopped circulating air. This started after I changed the o2 sensor. Mybe I accidently dislodged a hose from the blower. Is there a diagram of that system available on-line?

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  • Steve DuBose May 30, 2008

    I did what you suggested, and did discover a dislodged vaccum hose. The problem resolved, thanks



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Actually there is a diagraman go to and then you can buy the diagramas for that specifici car just look for alldata,
or what i can sujest is to look for a small black disconected hose closed to the area you did work because most of this a/c systems are controled by vacium and if you accidenatlly unplug a hose thats what happend, you can also try to locate this hose with the car runung a look for a noise like air leak

Posted on May 29, 2008

  • fernando arevalo May 31, 2008

    you are very welcome and i will apreciate your feedback to me thanx



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There are 3 likely possibilities:

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  2. Disconnected or hole in air flow hose - sometimes a vent hose will dislodge just enough to disrupt air flow. Check underneath the inside of the passenger compartment for any loose hose connections. You can also turn the heat (or vent) on HI and check the air flow hose for any pinholes that also could disrupt your air flow
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