2006 Rear A/C problem

[dew777]

My problem is with a 2006 Explorer with the rear A/C temperature control. With the temperature turned all the way to the COLD setting on the rear (top vents) it only blows medium cold while the front vehicle vents blow REALLY cold. But it I send the cold air to the floor discharge they blow REALLY cold just like the front vents.

So, it feels like when I direct the air discharge through the top/rear vents that it isn't as cold as when it is sent to the floor/rear vents. . .

I'm guessing maybe it's a blend door, but I don't know what where they are located or where to even begin.

Again, the A/C works great in the front vehicle vents it's only the rear/top that are warm.

Thanks in advance!