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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Comments (48)
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  • Guest - Angela

    04 Chevy Silverado
    Duel AC
    Will be driving with AC on and the drivers side will start blowing hot air while pasenger side continues to blow cold. Can turn the key off and restart andnir will start blowing cold again. It doeant do it all the time.

  • Guest - john


  • Guest - Gerry

    Where is location of the door actuator on a Buick Century 2004?

  • Guest - Leapord Norma

    Where is location the door actuator on a 2007yukon XL at

  • Guest - Vicky

    Where is temperature door actuator on a 2002 Cadillac deville. Blows hot on drivers side, cold on passengers ? Please

  • Guest - Tom

    In reply to: Guest - Vicky

    One on the drivers side, one on the passengers side, under the dash, on the center plenum.

  • Guest - Bob

    I have a 2005 Equinox that blows Hot on drivers side and cold on Passenger. Where is actuator door on this model please?

  • Guest - Tom

    In reply to: Guest - Bob

    Under the passenger side of the dash, behind the glove box.

  • Guest - Rick

    Where is the temp actuator flap on a 2014 GMC sierra?

  • Guest - Terri

    In reply to: Guest - Rick

    Were you able to figure this out? I’m having the same problem with my 2011 acadia.

  • Guest - Marcia

    My 2015 Chevy camero blows warm air out both driver vents. The passenger vent in the middle blows cool but the the passenger vent by the door blows warm also

  • Guest - Kerry

    My 2014 Ford Taurus blows cold on the drivers side and hot on the passenger side. Why ?

  • Guest - Shelly

    In reply to: Guest - Kerry

    2009 Kia Rondo colder air on drovers and warmer on passenger side??? Does it need Freon or activator. Thxs

  • Guest - Rosie

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

  • Guest - Ray

    In reply to: Guest - Rosie

    Location of temp control actuator brake side 2004 chev ppickup 1500 4.8 liter

  • Guest - Harry

    In reply to: Guest - Ray

    2004 Chevy Silverado 3.4 pick up

  • 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 - tim

    In reply to: Guest - coinra

    The temperature door motor on your Buick is located under the passenger side of the dash, near the center, on the heater case.

  • 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

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