2002 Sonata A/C Problem

Discussion in 'Hyundai Sonata' started by duane.moseley, Nov 26, 2006.

  1. I have a 2002 Sonata with 75,00 miles on it. Yesterday I used the a/c
    with no problem. I then used the heater later that night. Now I can
    only get it to blow hot air. No matter what setting I use, hot air
    comes out of the vents. The compressor seems to be running and the
    lines coming from it are very cold. I think maybe the heater switch is
    stuck or something. Can anyone help? Thanks.

    Duane
     
    duane.moseley, Nov 26, 2006
    #1
  2. Sounds like the dampers that control air flow are not working. There is a
    "blend door" that may be sticking or the controls not working. .
     
    Edwin Pawlowski, Nov 26, 2006
    #2
  3. duane.moseley

    hyundaitech Guest

    If you have cable-operated heater controls, you should check to make sure
    none of the cables have come detached from the heater box.
     
    hyundaitech, Nov 30, 2006
    #3
  4. How do you know if you have the cable -operated heater controls?

    Duane
     
    duane.moseley, Nov 30, 2006
    #4
  5. duane.moseley

    hyundaitech Guest

    You'll just need to stuff your head under the dash and look up at the
    heater box. If there are cables attaching to it from the heater control,
    you have cable-operated heater controls. Make sure the cam (the piece to
    which the cable attaches) is in place, the cable ring is attached, and the
    cable is clipped properly onto the heater box.
     
    hyundaitech, Dec 1, 2006
    #5
  6. duane.moseley

    hyundaitech Guest

    Sorry. Responded to myself instead of you, Duane. See my response to
    myself above.
     
    hyundaitech, Dec 2, 2006
    #6
  7. I looked underneath the dash and near the center there is a plate with
    a slot in it with a pin hanging down in one end of the slot. . When the
    car is on heat the pin is in one side of the slot. When I switch it to
    ac the plate moves about a half inch and the pin moves toward the other
    end of the slot. I am assuming that it should move all the way to the
    end of the slot to let ac air through. I tried to force it around but I
    can't get it to budge. I don't see any cables but it looks like some
    white gears on the other side of the plate that are controlling its
    movement. Not sure if I explained that well enough or not. Thanks for
    your help.

    Duane
     
    duane.moseley, Dec 2, 2006
    #7
  8. duane.moseley

    hyundaitech Guest

    You're on the right track and you've found the right area if it moves when
    you change the temperature. If you don't see a cable, there may be an
    electric or a vacuum actuator there.
     
    hyundaitech, Dec 5, 2006
    #8
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