it sounds to me like the passenger side control knob needs to be exchanged. This or there should be a relay in the line that is faulty. try wiring the driver's side control to the wires coming into the passenger side control. If this doesn't work, then it may be a computer glitch.
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The 2 vents on the drivers side have warm air blowing out. ... 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. https://www.justautorepair.com/buick/century/cool-passenger-warm-driver
This is an attempt to answer. My Dodge Grand Caravan has a sliding control for the heat/cool setting. It is marked driver and passenger so one can direct heat/cold where it's needed most.
Most likely you have already checked this out, but worth a try!
Jun 25, 2009 - Hot air from vents-driver side and cool air from vents on passenger side. ... The driver's side vents were blowing out hot air, and everything else wasblowing cold. ... you'll literally have to restart your tahoe/yukon at every traffic light to keep cold air coming ... I was also getting air only out of the defrost vents.
? 3:14
https://www.youtube.com/watch?v=5lnd8UNcx6M
Aug 3, 2013 - Uploaded by South FL Mud Club
Suddenly hot air started blowing out the air vents only on the drivers... ... is a very helpful video ,I wondering if this part number apply for my 04 chevy tahoe? .... I have cold air out of thepassenger side, but warmer air out of the driver's side. .... 2003 Tahoe No Rear Heat Fix, Suburban, Yukon XL Repair!
Driver/passenger air vents blow hot then cold when using A/C. Back to cold when you restart the vehicle. Upvote (35) ... 2003 Chevrolet Tahoe ... I have a 02 Tahoe ,and the heat system is working only on the ceiling side of the car when turn.
There is a damper that controls whether heat or cooling or somewhere between that is controlled by the temperature controls. A separate system is controlling the passenger side and the driver side heating and cooling. I hope this is still under warrantee. If not it might be a big job to diagnose whether the problem is in the heat and cool controller, the wiring or the damper device. I hope this helps.
Do you have separate drivers side and passenger heat controls? If you do have this system,the common problem is the control unit s on the heater/a/c assembly. Can you adjust heat and cooling on one side? Then the other side control unit is most likely bad.
Hello. The side that is not operating properly has a bad temp door actuator located up under the dash. I am assuming this vehicle has driver/passenger(dual)climate control heat and cold settings. This is a very common problem on these vehicles. Hope you find this information useful!
Is it leaking antefreeze?
The thermostat might be gone or needs a bigger thermostat
It could be a vaccum leak for the drivers side blowing cool air and the passenger side blowing warm air
Does it have dual air control switches one for drivers side and one for passengers side?
Sounds like a problem with the "Drivers side temp actuator motor".
Each side has a motor that controlls the temp. door inside the dash for the driver or passenger side. These motors are approx. $75, plus 1 hr. labor to install. See more info here... http://www.greatautohelp.com/more-buick-questions.html
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