Posted another question describing how messed up it was acting. I've noticed over the last few days in the morning and when it's been sitting for hours (outside templ in teh 30's). I get in turn the auto all the way to 90 and I don't hear the blower running at all. It wont' come on in auto mode but i can put it in manual and crank it up. Is this something anybody else has seen. The truck is an 05 Lariat.
Thanks,

 

I don't think it starts blowing until the engine reaches a certain temperature.