I think I read somewhere that it uses the outside air temp to decide what to do.
I also have had the problem where the temp sticks and takes it's time adjusting to the OT.
Last night we were at a ball game till 9:15pm. I hit the remote start as we stood around talking. Outside temp was low 50's. (Hey we freez our a$$ off down here below 60
When we finally got in the **** A/C was blowing full blast & the O/T was showing 82 degrees ??? The wife had a fit & I got the heat working. After we got going a few miles the O/T finally came down to 50.
I will make the complaint to service dept and hope that enough complaints will get something corrected. Others on this forum have had their temp's stick.