Hello,
It sounds like you have a faulty blend door actuator for the driver side.
The blend door actuator is what controls the hot/cold air mix, and it can fail in stuck to one position.
The blend door actuator for the driver side is located under the dash on the driver side.
I have attached the replacement procedure below for your reference.
Let me know if you have any questions.
Thank you.
https://www.2carpros.com/articles/replace-blend-door-motor
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Sunday, October 30th, 2022 AT 8:42 PM