New to the forum.
I have a 2002 GP GT. For a while now the heat and ac on the passenger side has not been working properly. In the winter even when the control switch is on heat it's blowing ice cold air. Sometimes messing with it will give lukewarm or hot air, but it never stays; after a few minutes it goes back to cold. I just replaced the actuator, but that didn't solve the problem. What else could it be?