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Air Vents S90-V90

posted by  daveha on  Tue Sep 28 07:13 CST 2004
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last visit: Tue May 24 00:39 CST 2011
[RELATED]

My main vents are not working. When I turn on the AC/or just air, it all goes to the foot vents. All dash vents are not blowing air. How can I fix this?

My email is daveha@gmail.com.

Thank you.








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    Air Vents S90-V90

    posted by  eviltwin on  Wed Sep 29 06:21 CST 2004
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    last visit: Wed Jun 20 21:30 CST 2012
    [RELATED]

    Make sure there is not a problem with the ac control module. It is on the passenger side just to the right of the center console, Once you remove the lower part of the dash, you should see it, it has a combination of vac and elect. lines connecting into it.
    --
    97 S90 with 176K miles still going strong








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      Air Vents S90-V90

      posted by  Hardcastle on  Thu Sep 30 10:08 CST 2004
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      Hey guys...WELCOME ME IN...1998 S90 LE BEAUTIFUL,,,1 prob though..ac works, compressor works, BUT...hardly nothing out of the Main vents...just a little bit even on high...cant hardly fell anything...i bought the car for my wife..Do not want her cupped up in a beautiful car with no AC...and the compressor has the correct amount of pressure also...HELP PLEASE...








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    Air Vents S90-V90

    uid 25930's pic
    posted by  VHT on  Tue Sep 28 08:58 CST 2004
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    daveha, first make shure the vacume lines are all concted in the engine



    There could be a leak in one of the vaccume motors or lines under dash. Do you hear hissing sound from inside the dash? The 960 vacume leak problem is expalined in the faq, but I fixed it without going through all that by bypassing the vacume motor controling the front air vents, leaving the front vent open all the time. Under aceleration it stays open. Very easy to do.

    VHT
    92 960 199k








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      Air Vents S90-V90

      posted by  brownboy on  Tue Sep 28 10:48 CST 2004
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      last visit: Fri Jan 1 14:31 CST 2010
      [RELATED]

      Great picture and helpful diagram.

      How did you go about bypassing the vent motor? I need to do it as my dash vents do not work under acceleration.

      Mike
      --
      Mike Brown Greenville, NC 1996 965 113K 1994 940 135K 1986 244 137K








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        Air Vents S90-V90

        uid 25930's pic
        posted by  VHT on  Tue Sep 28 13:55 CST 2004
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        Thanks but I can't take credit for the picture as it's not mine.

        On the left/driver side, once you remove the panel and knee gaurd, you will see 3 vacume motors atached to the main air duct. One of them controls the flap that opens the front vents wich stays open as long as there is enough vacume presure, under acceleration due to another leak mentioined in the faq, all of them close. I removed that motor the door permanantly open and ruber pluged the hole and the vacume line.

        Under the hardest acceleration I still got air. This is a easy 15 minute job compared to the other way.

        VHT

        92 960 199K








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          Air Vents S90-V90

          posted by  Hardcastle on  Thu Sep 30 10:12 CST 2004
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          SIR will you explain that procedure with 1998 S90...No air out of vents...just a little bit...the controls for the floor..face...feet and face is not working i think..HELP..the middle knob on the ac unit..








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          Air Vents S90-V90

          uid 11021's pic
          posted by  dewfpo on  Tue Sep 28 15:27 CST 2004
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          last visit: Thu Oct 23 18:34 CST 2014
          [RELATED]

          I plugged the vacuum line going to the bad vacuum bellows. The dash vents work fine now.

          DEWFPO
          --
          1998 S90 070,350 and 1995 964 153,650







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