I think you were on the other thread where the RS (looks like AS) shows for remote start. if it were me, I would try seeing if I can change any settings in that mode and see if they stick. Equally I would try the same before I turn the car off. If none of those work I guess something is not right and you would need a scan tool that is able to read the HVAC control module to see what is going on and if there are any error codes.
From the owners manual, in case someone else finds this thread:-
If the vehicle has the remote start feature, the climate control display initially shows “RS” in place of the temperature to indicate the remote start has been activated. The remote start system turns on using the last temperature selected before the vehicle was last turned off. For best performance, turn the fan and mode knobs to the AUTO position. The fan speed and air delivery modes will change to achieve the best comfort. If the outside air temperature is below 45°F and the air delivery mode knob is set to AUTO, the automatic climate control system starts in the defrost mode to clear the window. The automatic climate control changes back to manual operation by turning the vehicle on with the key