Question about 2003 Buick Rendezvous

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Only cold air on passenger side

I have an 03 Buick Rendezvous CXL with manual dual zone climate control and it was recently discovered that the passenger will only blow cold air. With both the driver and passenger side turned to hot, the passenger side blows cold air strongly while the driver side blows hot air weakly.

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  • Anonymous Oct 18, 2008

    I have the same problem on my 2006 rendezvous. I do get a little warm air if I put the control for floor vent only.

  • kmaynes Oct 23, 2008

    Yes, I have the same problem in my 2003. It seems like it blows less on the drivers side, but colder on the passenger. Same exact issue. Is it the climate control heat valve? Can I repair this myself?

  • jwfarrell Nov 09, 2008

    I had my problem fixed at the dealership for about $250, they said it was the passenger side temperature actuator. However, the first time they "fixed" it they replaced the wrong actuator (driver's side) so the problem persisted. I took it back in and they admitted their mistake, ordered the new part and told me to bring it back in when the part arrived. After leaving the dealership that time it did work, leaving me to believe that it was not the passenger actuator and something simpler. I brought the car back in to let them swap out the passenger actuator just in case the second fix was temporary. I am not sure, at this point, exactly what the problem was, but they fixed it for $250.

  • Big Cluck Jan 08, 2009

    I have a 2004 Rendezvous with the same problem...I am thinking about changing the actuator but am not sure that is the problem. A friend of mine works at a dealer ship and he spoke with one of the mechanics. He asked him and was told that sometime the sensor kinda gets stuck and you have to put the temperature on cold for 2-3 minutes and then slowly turn the knob and increase the temp all the way. I tried it several times with no luck..........



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I would first check and make sure that you have enough Freon in the system, on climate control dual systems only one side will put out cold air if the system is low on Freon. Eventually, both sides will put out warm/hot air if the system continues to loose Freon. As with all leaks the system should be checked and then the leak causing component replaced/repaired.

Posted on Jun 10, 2009

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I had the same problem this fall. They replaced the temp control module door. Luckily it was still covered by the extended warranty as it was over $700.

Posted on Feb 12, 2009

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I would assume with multiple people having the same problems, there should be a service bulletin on this issue. may want to call dealer with vin # to verify. sounds like a heater control issue under the dash. something i would leave to the experts for repair

Posted on Nov 09, 2008

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I have a 2003 Buick Rendezvous. The drivers side blows hot air and the passenger side blows cold air. The car has that dual zone climate control. I have no clue where to start.

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