A/C Vents Blow Cold on Passenger Side But Warm Drivers


Problem with my 1997 Buick.
Engine size = 3.3L V6.
Repairs for this problem = A/C compressor, orifice tube and drier replaced about 1 year ago. The problem I have is that when you turn the ac on the cool air only comes out the 2 vents on the passenger side. The 2 vents on the drivers side have warm air blowing out. A/C is controls are set to max air and max cold on the temp control.

Answer: Most common problem is a bad temperature door actuator if it does have dual zone A/C. This actuator controls the temperature door for that side. Dual zone systems have a temp door for each side.

If the car does not have dual zone climate control, this sounds like a problem that some mechanics miss. This problem is a low freon charge in the system. It will not be apparent if just looking at freon gauge pressures- they will be normal. But a system that is 1/2 pound low will cause the passenger side vents to blow cool or cold air, and the drivers side to be less cool or even warm on this car. There is simply not enough freon capacity in the system to cool the air to the drivers side. Only way to be sure is to drain and measure the freon in the system.


Where is temperature door actuator?

Answer: We would need to know what make and model Buick you are asking about. Are you looking for the drivers side or passenger side actuator?


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  • Guest - Rosie

    My 2006 Corolla blows cold air out passengers vents and warm air on drivers side

  • Guest - david

    need to know where the temerature door actuator is in a 2002 buick lesabre

  • Guest - Sheryl Armacost

    My 2012 Kia Optima the air conditioner is warm in the driver's side but cold on the passenger side

  • Guest - coinra

    my driver side defrost blows cold air and passenger side warm? Why? A/C works normal

  • Guest - Sadie

    2005 Pontiac Bonnieville gxp driver side blowing warm and passanger blowing cold. Why?

  • Guest - Jordan

    my work truck, 2004 silverado, just started blowing cold air on the passenger side and really warm air on driver side, dont know what i should do

  • Guest - Mrs Johnson

    2004 Buick Century hot air on driver side cold on passenger side

  • Guest - Dcp

    2002 buick cold pass side warm on driver no duel just had air compressor replaced after that the problem is cold air on the passenger side warm air on the driver side

  • Guest - Tim

    In reply to: Guest - Dcp

    Warm air on drivers side cold on passengers side 2000 pontiac bonniville

  • Guest - Seran

    2007 Honda Accord had the same problem I put new freon and it took care the problem

  • Guest - Kee

    In reply to: Guest - Seran

    Thanks for sharing! I noticed this today in my 2006 Accord. I will definitely try adding freon first.

  • Guest - Jd adams

    Replaced ac temp control still have warm air coming out passenger side and cold air on driver side and rear air is cold.this is a 2003 olds sillouitt.can anyone help on this.

  • Guest - Bill

    In reply to: Guest - Jd adams

    You have 2 problems. If the rear is not suppose to be cold, then the rear temperature door actuator is faulty. Same goes for the front. Whichever side is not giving the correct temperature- that side actuator is bad.,

  • Guest - Darold Thorne

    I have a 1997 oldsmobile cutlas supreme passenger side cools driver side blows heat. Please when time allows call me for help. My telephone no is 314 920 0629. At 81 years old I hope you can help me

  • Guest - victor

    I have a 2005 sts 3.6L. Cold on p/side, very warm on drivers side. Checked freon and its at 43 also took off dash to inspect to see if doors are opening and the are on both sides while i change the temp from hot to cold. I do not have an actuator..its all electronic..any suggestions

  • Guest - juanito

    my 2009 impala throws hot air on passenger side n cold air on driver side when I need the heat on both sides what that could be help

  • Guest - Bill

    In reply to: Guest - juanito

    Yes, again like most if these posts- a bad temperature door actuator. See this link... http://www.cartruckinfo.com/pontiac-drivers-side-warm-passenger-cold.html

  • Guest - Thomas

    Very interesting, just ran into this issue myself, 2001 regal, checked actuator, observed it working runs to top and back to set position, (removed it to manually test the position and determine if a position change would relive the condition, (warm air on drivers side) nothing changed. system has full charge to capacity, (this started when a petulant passenger pressed the duel control button and adjusted it, after that it never worked right again. still puzzled, thinking about calling junk yard

  • Guest - Parminder Bajwa

    2007 Honda Accord had the same problem I put new freon and it took care the problem

  • Guest - A Day

    Common gm problem. Caused mostly by low battery voltage or no battery voltage due to battery replacement, corrosion etc. Use scan tool to erase error codes even if none are shown on the scan tool. This will solve most hvac issues without tearing into any components.

  • Guest - Tyler

    I have a 2003 chevy trailblazer i have a dual climate control... It blows cold air on driver side and on passenger side and in the back the vents blows out hot are... Do u know what could possibly b the problem???

  • Guest - Billy

    In reply to: Guest - Tyler

    Yes, the temperature actuator in the rear unit is bad. It is located behind the passenger side panel as accessed though the rear gate area.

  • Guest - Robert Bunch

    I have the same problem as Steven except I have a 2003 buick century. It has duel temp controls I just changed the drivers side actuator but did not solve problem what could it be.

  • Guest - Tony

    In reply to: Guest - Robert Bunch

    Low freon charge gives the same symptom as a bad actuator- cool on passenger side and warm on drivers. Get the system to a full charge before changing any actuators.

  • Guest - Leo

    For those of you who have dual zone climate control. If you are getting cold air on the passenger side and warm air on the driver side it could be the actuator on the driver side, however, if you disconnected the battery,that could be your problem; the computer needs to be reset. All you have to do is:remove the ground cable from the battery and short it to the positive terminal on the battery. The positive terminal must stay connected to the battery, you only remove the ground cable, This will reset your computer. Hook the ground cable back to the battery, start the car, turn on the ac and run the temterature all the way to hot and then all the way to cold. Set it to the desired temperature. That's it! If the problem started when you disconnected the battery that will fix it.

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