No Switch Between Heating Areas

[RainiLaBrosse]

We've been having issues with our 2007 Ford Expedition. The heating refuses to change from front and rear to the floor heating, only going to the defroster. I've tried looking elsewhere but haven't been able to find a clear answer. Any suggestions?

 

[purevw]

Digital controller or knobs? There are 2 different climate controllers depending on trim level from what I can see. Both have separate front and rear controls, but neither has a "front and rear" setting, so you might try a better description to clear things up.