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 (30)
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  • 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.

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