after using my heater this weekend, it got stuck coming out of the defrost vents and I can't get it to stop even in the off position. I also can't get the temperature to change, it is blowing at 90 degrees. I had to drive 9 hours to get back home in this condition, the entire dash was burning hot from the heater blowing so long.

Don't know much about this electronic climate control and have been reading a lot only to be more confused (blender doors, actuators, eatc rebuilds, etc.)

This is an 03' King ranch SC with the electronic climate control.

I can't drive in South Florida with this heater blowing, at the very least I need to get it shut off ASAP.

 

I forget now but I think mine did the same when the blend door actuator broke, search blend door- you'll see how common. Now, another thing might just be a control switch, but I'm leaning toward blend door. Fan speed is able to be changed or no? I forget too, but does the auto climate control have the manually adjusted round ***** or no?

 

Maybe you can pull it fuse to the blower until you can get this figured out.