Question about 2004 Chevrolet TrailBlazer

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Dual climate control

On my 2004 trailblazer, my passenger side blows cool air, but the driver's side will only blow hot. The compressor is kicking on, so I believe it has something to do with the dual climate control. Any suggestions?

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  • Anonymous Mar 13, 2014

    HOW TO OPERATE CLIMATE CONTROL ON 2004 LT TRAILBLAZER

  • Anonymous Mar 22, 2014

    I have replaced the climate control unit but it still keep blowing heat ac compressor not working from control panel

  • Anonymous Mar 31, 2014

    open and shut the doors



    open and shut the door to have heat or air when changing to air the flaps wont open and shut.

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There is a thing called a blend door, it controls air temp, that is where the problem is, most common issue is the motor that operates the door fails.

Posted on Sep 05, 2008

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1 Answer

2003 chevy trailblazer blows cold air on passenger side and hot air on driver side


Sounds like a blend door actuator failure,11_24_2012_3_52_06_am.jpgMight as well replace both sides

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if it has dual zone climate setting it could be stuck in the cool setting. if it is not blowing any air it could be the duct came loose and it is blowing the air inside the dashboard. it will require you to pull the dash apart to inspect what the exact cause is. it could be anything from a bad temp setting switch in the climate control panel to a bad vac line that that switches the air from hot to cold. any other info you could give me may help such as if it is full electronic climate or manual knobs, dual zone, is it blowing any air or just no hot air.

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with a dual climate control system, it is imperative for a proper refrigerant charge to be maintained. the symptom you describe is a possible indicator of low charge on the system. the ac evaporator core is closest to the right side of vehicle thereby making air feel cooler on that side, on the left side of the vehicle the cooled air has farther to travel and warms up from cabin air before it discharged from the vents. this is the most probable issue for your vehicle...however if the charge is accurate, the issue would be more so in the air temperature doors which is located deep inside the dash...i hope this helps...good luck!

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