I have read a lot of posts about the clicking in the rear left panel, and found out it is probably the heater AC rear blend actuator. I have also read that there are TSB's on this. Where do I get the TSB and how can it help me? If this is so common of a problem, why is ford not paying to have this fixed? The noise is now to the point that it clicks even when the truck is in AUX power. Will it hurt the truck if I don't get the problem fixed? Seeing as how I cannot come up with appx $900 plus. Please give me any advice you can on this issue. Thank you so much.