Question about Pontiac Bonneville

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I have a 2000 Pontiac Bonneville. I just had a leak in the AC fixed (O ring). It blows ice cold now, but only on the passenger side. The driver's side blows warm. It has a dual temperature control (Driver/Passenger). Any ideas?

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  • wmhupp May 07, 2010

    Thanks. Can you explain how to do that? I'm a novice.

  • wmhupp May 07, 2010

    I have a 2000 Pontiac Bonneville. I just had a leak in the AC fixed (O ring). It blows ice cold now, but only on the passenger side. The driver's side blows warm. It has a dual temperature control (Driver/Passenger). Any ideas?

  • wmhupp May 07, 2010

    Thanks. How do I check those to see if they are working or jammed? I'm a novice.

  • wmhupp May 07, 2010

    I have a 2000 Pontiac Bonneville. I just had a leak in the AC fixed (O ring). It blows ice cold now, but only on the passenger side. The driver's side blows warm. It has a dual temperature control (Driver/Passenger). Any ideas?

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  • Pontiac Master
  • 11,800 Answers

Only the temperature control is faulty, that's clear. What is the fault , that's another problem. I guess the commands or the controlling flaps for the driver's side don't work. Why they don't work  - that's something to find out by removing the  air control panel from the dash and testing it, the air pipes and the control boxes, a quite fiddly job. If you haven't previously worked on something like that it's better to leave it to someone who has, you can damage it even further quite easily.

Posted on May 07, 2010

  • Azrael SRL May 07, 2010

    To see what is wrong with the air control flaps you must dismantle (at least partially) the dash to access the air pipes and control boxes and this is a long, fiddly job that needs experience to be done properly - without breaking other stuff. By your admission you're a novice - i think this job is beyond your skills. Seek help from someone better experienced than you or, at least, find a Haynes repair manual and follow it to the letter.

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  • Pontiac Master
  • 2,019 Answers

The temperature control is an expensive cpu operated device. You could try a salvage one, but first try seeing if all the flapper gear motors or vacuum servos are working right. They could be jambed or broken. Try the control module last.

Posted on May 07, 2010

  • Kirk Augustin
    Kirk Augustin May 07, 2010

    Watch under the dash and in the engine compartment, as the controls are operated, to see that the servos and motors actually move. It takes 2 people. To see under the dash, you need to get completely unside down, with your head on the floor.

    Wear eye protection.

    You will need good lighting.

    The ducts will be pretty obvious, and the control will have vacuum hoses or wires going to all the motors and servos, that you can just follow back.

    Any one that does not move, is probably the problem.

    Compare with the ones that work.

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  • Master
  • 2,427 Answers

Check the driver side controll,, chances are its not connected and set to warm,,,,, you may also need to replace the control..

Posted on May 07, 2010

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I never heard about a need to "reset" a blend door.
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I assume that your concern is about trying to get cold air from both sides (not warm).
It could be the actuator or blending doors, but the most common answer is that your freon is low. I have a 2005 Bonneville and had the same problem. The good news is that you probably only need one can of freon and the auto parts stores have kits for the do-it-yourselfer. If you haven't done it before, I highly recommend going to someone that has done it before.
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