Well, if it makes you feel any better, it's not just the Edge that has this issue. I have seen some problems over on the Explorer forum, and I had to have the blend door/actuator issue repaird on my old F-250. I have seen it on other year models as well. So it seems to be more a Ford issue rather than a specific model. I'm sure other brands have issues as well, but I can't be sure since I have had mostly Fords. My Dodge Charger did not have this type of issue. I have a 2016 Edge, with just over 100K, and no issue with that yet. My Explorer is a 2023 with around 45K, and no issues with that one yet either. Yours is a 2007, so things are going to go wrong with it. It doesn't mean it's necessarily a bad car, it's just getting old.
There, now don't you feel a little better??