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SOURCE: 1998 buick park avenue drivers side blows cold, passenger side hot
sounds like the drivers temp door actuator is not working should be located on the drivers side of the air box down by the gas pedal or center dash area.
SOURCE: 2003 buick lesabre AC problem
You have to find the motor that controls the blend door and open it manually to find out which one is bad there are 3 blend doors on the HV/AC system one will be where the heater core is. The other will be between the vented air and AC? heating system then the third door will operate vents in dash and defrost condition. If you have someone operate them AC system heating system and watch the blend door motors, the one you find not moving will be the one that has the problem. They have vacuum and electrical motors, if it is a acuum motor you can move the door manually with your hand, if it's electric you will have to disconnect the rod by removing the pinch clip off of the rod.
SOURCE: cold air on passenger side warm air on drivers side
Actuator motors either get a tear in the rubber or a hose is broken and not letting vacuum assist in its opening.
You can try moving the lever by hand and see if the air gets colder on the bad side.
SOURCE: How do you fix the driver side air blend door actuator?
you cannot repair the actuator you need to replace it with new one. These motors turn but get weak with time. if you test it, it works, put it in and it doesn't. this is because the motor is weak, unfortunately GM does not sell these motors separately.
SOURCE: 2005 tahoe a/c blowing hot air on driver side
There is a actuator motor that controls this,and it is not working,unfortunately ,the whole dash has to be removed to replace the actuator motor.If this was at all helpful,please rate,thank you.
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