climate control warm on driver side?

2009 CHEVROLET IMPALA
10,000 MILES • 3.9L • 6 CYL • 2WD • AUTOMATIC
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MEOW2K47
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  • 10 POSTS
ac blows cold on both sides heat blows warm on driver 7 hot on passenger
Jan 8, 2026 at 5:55 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 54,176 POSTS
So, it sounds like the blend door motor on the driver side is weak or there is an obstruction inside the HVAC plenum not allowing the blend door to close completely. The way to check the blend door is to remove the actuator and move the blend door pivot from lock to lock and see if you hear the door connecting both internal duct ports. Here is the location of the actuator so you can check it out, if you can hear the blend door and to moves freely, I would replace the actuator. Check out the images (below). Please upload an image or a short video in your response, so I can see what's going on. Ken
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Jan 9, 2026 at 10:16 AM
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