Just general info... Where there is fancy controller where actual cabin temperature is selected, includes a cabin temperature sensor, and ambient/outside temperature sensor, those are always suspect. Your condition would be the in cabin temp sensor.
The Toyota forums have helped me ( 96 Camry ). My problem was the door for fresh air or recirculated air.
It has A/C. I was thinking some sort of sensor also. The fresh air actuator makes sense. If I switch it to blow out of the center of the dash I move the fresh air selector. It blows hot out of the center.
