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Having the same issue, also including my rear AC as well blowing warmer air. Only the passenger side blows ice cold. This is on my 2019. I hooked my computer up and did a calibration and test and it all appears to work but still did not fix the issue. I can actuate the right blend door and it will work, but I can not actuate the left blend door with my computer which I find odd. It just randomly started doing this a couple days ago.
 
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