for some reason my fan controls work backwards .I have an 06 f150xlt.I went to defrost my windshield this morning and when turned my heater on and turned the **** to defrost it ended up comming out the vents.when i turned **** to vents it went out windsheild and floor.can any one help with this????????

 

Sounds similar to a warranty problem I had where the blend door box had to be replaced. This is the box that directs your air flow to the appropriate vent outlets. Assuming you are under warranty still, see your dealer. I have a post on the specifics, but would have to research it. Can do if you need it, but your dealer should be able to diagnose quickly. Good luck.