Hi all. New to the forum. The last couple of days, my LTC Heat hasn't been coming on when I'm warming up the car. The car is fully warm, temp gage is up into normal running position. When I get in the car after warming it up for 15 minutes, it still blowing cold air. Soon after I drive away, the air switches to warm. As I recall, if I set the heat into auto mode, the blower won't even come on until it gets to a certain temperature, so there must be a temp feedback and a valve somewhere. Any explanation of how this works, and how to fix it sure would be appreciated!