Question about 2004 Chevrolet Suburban

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Interior A/C My 2004 Suburban has separate temperature controls.When driving sometimes the driverside starts blowing heat and the passenger side is still cooling.When you shut the vehicle off it starts to work fine,What could be wrong with it?

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  • dgreer Sep 24, 2008

    AC blows

  • Anonymous Oct 07, 2008

    What is causing the heat to blow out on the driver side? and cool on the passenger side? When both are set to 70 degrees, on a 75 degree day? I need to tell my mechanic what to fix.

  • pjpk Oct 13, 2008

    I have exactly the same problem on my 2005 Suburban

  • Anonymous Oct 21, 2008

    Mine is stuck on cold on the driver's side. I'm thinking it's a problem with the air mixer motor that opens and closes the flap. Not sure though...

  • ccarlton5133 Oct 21, 2008

    ac blows out the drivers side,but full heat on passenger side,the control for driver works,but the contol on the passenger side doesnt matter what it is set on.

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  • 99 Answers

Get it checked by someone with a license to handle the chemicals. please email me at meanness628@aim.com with any other info or questions

Posted on Sep 30, 2008

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1 Answer

2004 CHEVY SUBURBAN FRONT A/C WORKS BUT THE REAR DOESN'T TURN ON


There is a blower motor control processor for the back blower - it takes input from the front control and the rear control and decides the fan speed. That processor could be faulty, or the blower motor, or a 30amp fuse in the engine compartment.
In the front system you have a controller and blend doors that direct air thru the heater core and evaporator. You would need to check the operation of those blend doors.

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1 Answer

On my 2009 1500 silverado, the driver side air cond blows HOT air as if the heat is on, but if you cycle the driver side temp control up then back down several times or turn the truck off like short trips...


There is a damper that controls whether heat or cooling or somewhere between that is controlled by the temperature controls. A separate system is controlling the passenger side and the driver side heating and cooling. I hope this is still under warrantee. If not it might be a big job to diagnose whether the problem is in the heat and cool controller, the wiring or the damper device. I hope this helps.

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I have a 2004 Yukon. The airconditioner blows


OK, do you have 'zoned' cooling where the passenger side can have a lower or higher temperature depending on a setting on the heating/ventilation/a/c console?
This is the way my Cadillac Deville is, it actually has a knob on the passenger side for the passenger to control temperature.

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Heater only works on passenger side.


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One side air blows cold one side blows hot


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There is probably a temperature blend door in the duct-work under the dash that is inoperable or stuck in the heat mode.

Jul 05, 2009 | 2004 Chevrolet Suburban

1 Answer

2004 Chevy Silverado AC is blowing warm air on passenger side.


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there are separate actuators for the blend doors. one for heat and one for cool. they work opposite and in conjuction with each other, if that makes any sense. ones open, ones close, for each different climate. sounds like the the cold one isn't opening in the rear.

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