is this happening to anyone???

everytime I start my truck lately the circulation button is turned off and it lets the air from outside come in, and even when I press the button after a little while it turns off again. it usually wouldn't be a problem but it is cold right now and its letting so much cold air in, or is it because i am useing heat ?

 

What position is your hot/cold knob in? If the knob is to max cool position I believe the vent stays open and allows cool/cold air in....as well as keeps the circulation button on.
Is this as clear or confusing?

 

thats awsome!!!!! thanks for you input, I thought I was going crazy. I don't know how many times I almost rear-end the people in front of me because i keep looking at the button to see what would cause it to do this