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    Junior Member ace's Avatar
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    AC not blowing through vents?

    My AC does not blow through the vents that face the passengers, only through the footwells and defogger vents. What could be the issue? It's a 96 GT vert if that helps. Thanks

  2. #2


    SN95 Supporting Member JeremyAlan's Avatar
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    Re: AC not blowing through vents?

    it does not blow through any mid-level vents? or it only blow in the driver side vents? that part confused me.

    My old V6 had this problem. There was a broken vacuum line that ran across the engine bay. replaced it and she worked like a dream.
    2.3 TVS Blower Swapped 2004 Cobra

  3. #3


    SN95 Supporting Member stanger's Avatar
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    Re: AC not blowing through vents?

    Check the resistor behind the glove box and make sure that all lines are connected properly. 5 min fix.

  4. #4


    SN95 Supporting Member JeremyAlan's Avatar
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    Re: AC not blowing through vents?

    Quote Originally Posted by stanger
    Check the resistor behind the glove box and make sure that all lines are connected properly. 5 min fix.
    also- could vac lines come unplugged from the switch it self?
    2.3 TVS Blower Swapped 2004 Cobra

  5. #5


    Junior Member ace's Avatar
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    Re: AC not blowing through vents?

    The vents that face the occupants so I guess the midlevel vents. It can't be the resistor because the blower does work, its just that no matter what setting i put the right knob on for example vent or norm ac it always either blows through the defogger and/or the footwells. i checked the vacuum lines but none seem to be broken. Where does the line that goes into the firewall connect to? Thanks!

  6. #6


    Senior Member CC'S95GT's Avatar
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    Re: AC not blowing through vents?

    the vacuum manifold is located on the driver side and the line goes along the fw to the passenger side where it enters the passenger compartment. The line is very small
    <br />95 GT.&nbsp;Bright Blue. Eibach lowered, Koni adj. shocks and struts, Steeda c/c plates, Steeda adj.upper rear control arms, sub frame connectors, 4:10's, alumnium drive shaft, BBK shorty headers, Bassani catted X-pipe, Pypes violator cat back, smoked H/L with 4500 duel beam&3 HID's, tri-ax shifter. bone stock motor.(for now) wheels-DD staggered anthracite bullets 315/40-17 rear, 255/45-17 front. 98 cobra hood

  7. #7


    Junior Member ace's Avatar
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    Re: AC not blowing through vents?

    Hm, I guess I wasn't looking at the right lines. I'll check in the morning

  8. #8


    SN95 Supporting Member JeremyAlan's Avatar
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    Re: AC not blowing through vents?

    i'll try to get a pic too tomorrow.

    i assume you own a GT?
    2.3 TVS Blower Swapped 2004 Cobra

  9. #9


    Junior Member ace's Avatar
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    Re: AC not blowing through vents?

    The only vac line I see is this one.

    And it gets plugged into this canister.

    And then the black line comes from the canister and there is vacuum all the way to here. None of the other color lines have vac though...

  10. #10


    Senior Member CC'S95GT's Avatar
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    Re: AC not blowing through vents?

    All of the colored lines are the ones that operate the vent doors.
    So you DO have vacuum in the black one when the car is running? Correct? Can you put a guage on it to see how much vac you have?
    If you do have vac then the next place to look would be the control panel
    <br />95 GT.&nbsp;Bright Blue. Eibach lowered, Koni adj. shocks and struts, Steeda c/c plates, Steeda adj.upper rear control arms, sub frame connectors, 4:10's, alumnium drive shaft, BBK shorty headers, Bassani catted X-pipe, Pypes violator cat back, smoked H/L with 4500 duel beam&3 HID's, tri-ax shifter. bone stock motor.(for now) wheels-DD staggered anthracite bullets 315/40-17 rear, 255/45-17 front. 98 cobra hood

  11. #11


    SN95 Supporting Member stanger's Avatar
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    Re: AC not blowing through vents?

    Awesome post DESERTCOX05! Now that's how you help someone. I'm going home to check mine now. I know that my heater box is broken, it was that way when I bought my car. When I turn the fan on it doesn't come on until it's on high and it only would blow under the passenger dash. Upon further investigation I noticed that the blower box was all busted up and I can see the heater core. It's not hooked up through the firewall and I don't know where the two lines coming through should go. In addition, I taped up the box as best as possible to at least get air moving across the windshield on cold mornings but that doesn't help since it's not heated at all. Can anyone tell me where the two heater core lines attach to in the engine bay? Also what is the best way to test the heater core for leaks, just add water? And last is it possible to replace the blower box without taking my dash apart?

  12. #12


    Junior Member ace's Avatar
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    Re: AC not blowing through vents?

    Quote Originally Posted by DESERTCOX05
    All of the colored lines are the ones that operate the vent doors.
    So you DO have vacuum in the black one when the car is running? Correct? Can you put a guage on it to see how much vac you have?
    If you do have vac then the next place to look would be the control panel
    Yea the black one has vac and no sadly i don't have a vac gauge

  13. #13


    Senior Member CC'S95GT's Avatar
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    Re: AC not blowing through vents?

    Quote Originally Posted by stanger
    Awesome post DESERTCOX05! Now that's how you help someone. I'm going home to check mine now. I know that my heater box is broken, it was that way when I bought my car. When I turn the fan on it doesn't come on until it's on high and it only would blow under the passenger dash. Upon further investigation I noticed that the blower box was all busted up and I can see the heater core. It's not hooked up through the firewall and I don't know where the two lines coming through should go. In addition, I taped up the box as best as possible to at least get air moving across the windshield on cold mornings but that doesn't help since it's not heated at all. Can anyone tell me where the two heater core lines attach to in the engine bay? Also what is the best way to test the heater core for leaks, just add water? And last is it possible to replace the blower box without taking my dash apart?
    2 heater lines- what year and motor do you have?
    testing the heater core- connect water hose to to 1 line and water should come out of the other
    replaceing the heater core/ box- your going to have to nuke your dash. It's highly labor intensive if you have a dealer do it.
    <br />95 GT.&nbsp;Bright Blue. Eibach lowered, Koni adj. shocks and struts, Steeda c/c plates, Steeda adj.upper rear control arms, sub frame connectors, 4:10's, alumnium drive shaft, BBK shorty headers, Bassani catted X-pipe, Pypes violator cat back, smoked H/L with 4500 duel beam&3 HID's, tri-ax shifter. bone stock motor.(for now) wheels-DD staggered anthracite bullets 315/40-17 rear, 255/45-17 front. 98 cobra hood

  14. #14


    Junior Member ace's Avatar
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    Re: AC not blowing through vents?

    Ok, so i remove the control panel bezel and I can see the flapper door. So when I put it on "vent" it tries to open but doesn't so i push it a bit and then it opens. Does this mean i don't have enough vacuum or what? Uh, I'm so close!

  15. #15


    Senior Member CC'S95GT's Avatar
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    Re: AC not blowing through vents?

    could be . I'd check the lines for cracks and check the door for binding
    <br />95 GT.&nbsp;Bright Blue. Eibach lowered, Koni adj. shocks and struts, Steeda c/c plates, Steeda adj.upper rear control arms, sub frame connectors, 4:10's, alumnium drive shaft, BBK shorty headers, Bassani catted X-pipe, Pypes violator cat back, smoked H/L with 4500 duel beam&3 HID's, tri-ax shifter. bone stock motor.(for now) wheels-DD staggered anthracite bullets 315/40-17 rear, 255/45-17 front. 98 cobra hood

 

 

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