temperature display

I just bought a 1 owner 2017 RTL-E w/23.9k miles for $31,900 from a ChryslerDJR dealer in NW OH. Not certified and no extended warranty, no floormats, only one key fob. Other than that, nice car. Paid a little more than I'd have liked but not many were available. Original owner was in Canada...

I've tried to work through the common scenarios and I'd like some new ideas to consider. I apologize for the length of the description but there are a lot of really obvious questions you would need to ask if I don't tell you where I am in the troubleshooting process...