Heat gets stuck blowing cold air and then it will switch to defrost and blow cold. Can’t control with switches.
Bad blend door actuator most likely. Common problem.
I think we’ve replace two actuators and a sensor. Had the computer synched at the dealer. It will work for a bit but then gets all crazy. It’s my son’s car so he has all the repair papers. It’s very frustrating. I’ve seen a couple of other posts with the same problem but never a definite solution given that works in the long term.