Thread: A/C/Heat air blows ONLY from defrost vents and floor

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  1. #21 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Killa Bee Scottydoggs's Avatar
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    ive seen the diagram for the part. why the dash comes out, its at the top of the hvac box, just under the dashboard.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  2. #22 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Donating Users bandook's Avatar
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    Are you talking about that round diaphragm actuator thingy? You have to be a 90lb double jointed circus acrobat to get to it, but its not impossible. Haven't replaced one but I did have to work on mine where it popped loose.
    Top Swapped 01 Imp
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  3. #23 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Killa Bee Scottydoggs's Avatar
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    no, its a plastic rod with a flap on it and a plastic arm off it the linkage hooks to. it breaks at the top of the linkage. off this rod.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  4. #24 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Turbo is the way to go. BillBoost37's Avatar
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    We fixed Gregs w/o pulling the car into a billion pieces.
    I drink..so consider that when reading my posts.

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  5. #25 Re: A/C/Heat air blows ONLY from defrost vents and floor 
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    FWIW I had a very similar problem not too long ago. The air blew out all of the vents and was therefore very very weak. And obviously the vent selector did not work. I needed up replacing the little rubber connector in the picture and now there's a blizzard in my car. Just in time for summer.

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  6. #26 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Quote Originally Posted by bandook View Post
    Are you talking about that round diaphragm actuator thingy? You have to be a 90lb double jointed circus acrobat to get to it, but its not impossible. Haven't replaced one but I did have to work on mine where it popped loose.
    Quote Originally Posted by ScottyDoggs View Post
    no, its a plastic rod with a flap on it and a plastic arm off it the linkage hooks to. it breaks at the top of the linkage. off this rod.
    I think it is the round diaphragm thing and the plastic rod goes up and down into it and I can't see what the other end of the rod goes to but after looking at that picture again. The top the rod looks like it broke of something.

    and yeah it looks like I need to be a god damn contortionist to fix the damn thing. At least on the drivers side.

    Going to dig into more this weekend.
    98 GTP-Mods? Yeah, lots of them
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  7. #27 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Wonder if this would help find any other problems.

    You must have a CJ2 unit (pictured below) to view this information. To enter diagnostics mode:
    Press and hold both the Driver and Passenger knobs in simultaneously until the display changes to read "-00". To change position, turn the Driver knob to the desired number and turn the Passenger knob one click to view the data for that position.

    Position Description US Observed on mine Canada
    -00 Error codes (List of Trouble Codes Below!)
    -01 (servo position) 103-107 43-162
    -02 (servo position) 128 120-202
    -03 (servo position) 150 162-194
    -04 CJ2 Fan Speed Low=15, 29, 44, 58, 71, 86, 110=High, CJ2 Unit will adjust to other increments as needed
    -05 (servo position) 93 88-191
    -06 (servo position) -152 00-252
    -07 (servo position) 00 0, 34-255
    -08 (servo position) -155 00-255
    -09 (servo position) 00 0, 23-255
    -10 ? 04 04
    -11 CJ2 Vent Mode 1=Def, 2=Bilevel, 3=Auto, 4=Lower, 5=Def+Lower
    -12 Engine Coolant Temp -60 degrees 80=104, 95=131, 100=140 Peak@135F
    -13 Actual Vehicle Speed in MPH
    -14 (servo position) 00 21=0
    -15 ? 39 44
    -16 Radiator low fan turn on temp -106 207
    -17 Radiator low fan turn off temp 196 199
    -18 ? 50 51
    -19 (servo position) 162-169 40-172
    -20 Affected by cabin temp sensor 89 50-172
    -21 (servo position) 00 ?
    -22 Sunload Sensor -117 LIGHT=126, 218=DARK
    To return to normal operation, press the MODE button next to the Passenger temperature knob.

    This is a list of the Trouble Codes displayed by the CJ2 Unit.
    A two digit code indicates a current fault while a three digit code indicates a historic fault.
    Trouble Code Description
    00 No System Fault
    01 or 101 Inside Air Temperature Sensor Short
    02 or 102 Inside Air Temperature Sensor Open
    03 or 103 Ambient Outside Temperature Sensor Short
    04 or 104 Ambient Outside Temperature Sensor Open
    05 or 105 LH Electric Actuator Open or Short
    06 or 106 RH Electric Actuator Open or Short
    07 or 107 UART Serial Data Line Fault
    08 or 108 Solar Sensor Open
    To clear codes from the CJ2 Unit, press the A/C Mode button.
    98 GTP-Mods? Yeah, lots of them
    2009 HEMI RAM- Mods are in the works!!

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  8. #28 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Well, find the problem.
    This little fukcer has caused me problems for over 10 years.




    It was very fun to get out, just hope I could get the new one in. Was going to superglue it but would be pissed if it broke again..

    Thanks again Scotty for all the help..
    98 GTP-Mods? Yeah, lots of them
    2009 HEMI RAM- Mods are in the works!!

    01 Regal GS-SOLD :-(
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  9. #29 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Killa Bee Scottydoggs's Avatar
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    your lucky it broke low like that. what side is that from?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  10. #30 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Drivers side

    How do they normally break?

    Passenger side looks fine, but I didn't check to see if it moves. Doing that today.
    98 GTP-Mods? Yeah, lots of them
    2009 HEMI RAM- Mods are in the works!!

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  11. #31 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Killa Bee Scottydoggs's Avatar
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    the plastic breaks most of the time. that looks like a metal rod.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  12. #32 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Yeah, everything seems to function fine. Just metal arm broke.. Have no idea how that could happen..

    I've been under my dash many times, but never messed around with these Actuators. Hell I didn't even know they were there.. lol
    98 GTP-Mods? Yeah, lots of them
    2009 HEMI RAM- Mods are in the works!!

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  13. #33 Re: A/C/Heat air blows ONLY from defrost vents and floor 
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    YES!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!

    It works!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!


    But holy **** that thing was a ***** to get back on that little hook!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    After fighting with it for over 3 hours with breaks in between. I realized the hole on the metal arm is very small on this new part compared to the longer oblong hole on the stock part. So in order for me to get the new part on. I would have raise it almost horizontal and slide it on the hook.

    Ummmmmmm, that's not going to happen. There is no room. lol

    Even making the hole big enough was still hard to get on the hook.
    I got a coat hanger and made a hook, so I could wrap it around the other hook. Pulled it down so I could slide the metal arm on to it. Trust me it took way more than a few trys to get it.


    ohh, Then I turn my car on to test it. Climate Control doesn't come on!!!!! !!! I was literal about to drive it off a bridge..lol


    Come to find out I took of a ground wire when I un-installed that lower metal piece. I have no idea why that ground wire way over by the headlight switch has something to do with the Climate Control but it does. So it came on.!!!!!!!!!!! All good.

    Now just need to get my A/C vacuumed and recharged and will be ready to go..

    I can't tell you how excited I am. This has been 10+ years with no A/C and almost as long with this air flow problem.!!!!!!!!!!!!!!!!!!!!

    Thanks Thanks Thanks again Scotty and Bill and anybody else for the help.
    98 GTP-Mods? Yeah, lots of them
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  14. #34 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    Killa Bee Scottydoggs's Avatar
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    i didnt think those things were such a pita to change. that part sucks, but now you'll get cold air in the face when the a/c gets repaired.

    10 years is a long time for no a/c. some how the a/c is one of the very few things ive not had to mess with in my car. its blown ice cold since the day i got it. if it was to fail, it would be high on the list of repairs asap!!!!

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  15. #35 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    SE Level Member zbban1's Avatar
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    Quote Originally Posted by ScottyDoggs View Post
    if it was to fail, it would be high on the list of repairs asap!!!!
    I couldn't have said it any better than that...period. LOL


    Just went through this myself, although I did have a/c, it didn't blow out of the vents it was supposed to and blew from the defroster, weak, blah. With Scotty's help, now it'll blow you out of the car in a couple of mins. on max! Fixed cruise, too, which hasn't been working since i bought the car. Now I'm so used to not having it, it's hard to remember when I get out on the highway that I can actually set it and CRUISE! lol
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  16. #36 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    GTX Level Member Ridin ON Chrome's Avatar
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    Quote Originally Posted by ScottyDoggs View Post
    i didnt think those things were such a pita to change. that part sucks, but now you'll get cold air in the face when the a/c gets repaired.

    10 years is a long time for no a/c. some how the a/c is one of the very few things ive not had to mess with in my car. its blown ice cold since the day i got it. if it was to fail, it would be high on the list of repairs asap!!!!
    Luckily the GTP has been a garage queen for a while now. I agree if it was my daily, the ac would have been fixed a long time ago.


    Quote Originally Posted by zbban1 View Post
    I couldn't have said it any better than that...period. LOL


    Just went through this myself, although I did have a/c, it didn't blow out of the vents it was supposed to and blew from the defroster, weak, blah. With Scotty's help, now it'll blow you out of the car in a couple of mins. on max! Fixed cruise, too, which hasn't been working since i bought the car. Now I'm so used to not having it, it's hard to remember when I get out on the highway that I can actually set it and CRUISE! lol
    That's good to hear, I've seen some of your post too!!!
    98 GTP-Mods? Yeah, lots of them
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  17. #37 Re: A/C/Heat air blows ONLY from defrost vents and floor 
    SE Level Member zbban1's Avatar
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    Thanks! Mine was a matter of vacuum lines being jimmy-rigged and blocked off by the previous owner. I just hope I never have to replace the part you did, sounds like it was a PITA...

    Now get that a/c charged back up and enjoy!!! I know I am...lol.
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