I am trying to figure out if there is a malfunction with the HVAC system in our ascent. I have noticed that driving with the HVAC off, on a cold 50 degree day, that heat builds up in the vents to the point where it is too hot and bothersome and I have to turn the A/C on to clear it. I don't recall this ever being an issue with our forester if the system was disengaged. Do I need to set it to recirculate or set a certain temp before turning it off so heat doesn't come through the vents? Are other people experiencing this? Thanks.