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There are two settings that need to be made on the body computer using an OBD. I am not going to tell you how to do this, as you have a different model. You can look it up. I did it on my 2021 Ram 2500. I also had hot air and no HVAC controls until I made the change.
I replaced my 8.4 screen with one from here about 2 months ago. https://oeautotronics.com/products/untitled-aug21_09-01. It has been great, have had no issues. Cost me $300