A/C on my 2011 F450 is cooling, but not moving enough air. Will eventually cool down, but takes a while especially on hot days we've been having. Took to dealer, they initially indicated it was cooling, so I clarified that air flow seemed to be the problem. The tech located a TSB requiring replacement of housing around evaporator coil, etc. Parts on order. Don't yet know what the real issue is, and have some concerns that my truck may be the guinea pig for this TSB at the dealer I'm using (will have more discussion with dealer before proceeding). Will let you know how this turns out.