I have a 2015 IS350 f sport. Today I was driving with the climate system on auto at 69 and noticed that it wasn't cooling as cold as normal. Then I took it down to Lo and and it blew hard but not cold. Next I felt around the back air vents and clearly heat was coming out from them. Has anyone had this issue? I made an appointment to take it in on Wednesday but I was hoping there was something I could do. Like a system "reset". Thank you in advance!

 

Sounds like you are experiencing an issue with the blend door servos.
A few other members have noted this issue occurring in the front with hot on one side and cold on the other.
The dealer re-initialized the servos and everything was fine after.
Chalk it up to a software glitch.