Rear air conditioner not working in 2002 Ford Expedition.

First. Is the front a/c working? Second besure that the heater blend dial is all the way to cool. Btw did you just purchase it?

Now Mr./ Miss moderator. Simply questions like this come up 2 or 3 times a day. So why not add a section for these common everyday problems that questioners can go to so that they can get back on the road sooner.

Have you set the overhead controls to the rear unit? try that if you have fron a/c