Hello, this is my first time making a post because i can usually find my problems from other peoples past experiences since it’s such an old vehicle. My Expedition has not had rear A/C for a long time (my dad owned it before i did) and i am having problems pin pointing the problem because it seems that most people don’t have the same package as I do. I have an Eddie Bauer with a sun roof which gives me a rear climate control panel attached to the center console along with the stock radio controls. when you use the controls nothing happens but the front A/C and heat work great. My rear A/C goes to the two small vents shown and the 3rd row which would help circulate cold air throughout the entire vehicle instead of it all coming from the front 4 vents.
Not sure which model year you have. Looks like your EB has manual climate control. My 2002 Eddie Bauer has the power moonroof with EATC, so the rear climate controls look and work differently than yours, with vents placed throughout the floor and ceiling of the middle and rear passenger cabin areas. Images 1 -5, from left to right:
(1) Front controls for rear HVAC (Looking down on front of console)
(2) Rear HVAC and audio controls
(3) With cupholders open
(4) Mid-cabin ceiling vents behind power moonroof
(5) Rear ceiling vents above 3rd seat
Your rear controls appear to be fan/directional only; no temperature controls. I would check power to that rear fan since that and a directional baffle of some kind are the primary operators involved in the system. I'd start with the fuse(s).