Remove glove compartment box on passenger side, u should see the actuator its white box with wire harness in front gots four SCREWS(TORX) just remove and replace or to troubleshoot just turn heater and blower on high make sure harness is attached make sure its turning.hope it help a lil bit Check out this step by step process for replacing the heater core that provides great diagrams and information that will help: https://www.queegebo.com/content/view/31/27/
In the back/middle
How do i replace blend door motor
You don't!
Assuming you are looking for the temp blend door actuator, remove the center console and you will see the actuator under the dash. It should be white in color.
How do I locate the heater blend door actuator in a Ford f150 pickup
how to replace a blend door actuator on a 1999 ford ranger
You have a faulty temperature blend door actuator located directly behind the radio. Remove the radio and remove the blend door actuator held to the heater case with three 8mm screws, and replace it.
rear a/c blend door actuator bad [broken plastic gear]
the actuator door is above the actuator motor which is above the floor vent ducts in the middle of the dashboard at the bottom easy fix on F- 150 on a Expedition you have to remove the middle console first to even get to that section of the dashboard.
The Expedition uses the same HVAC system as the Ford F150 pickup truck. The Expedition is a little tricky because you have to remove the center console and floor heat distribution vent to access the actuator motor. Once you remove the motor, you can examine the blend door axle for cracks or breakage. This is a common fail mode on the Expedition. HeaterTreater is the world's leading company for aftermarket blend door fixes and has a product for the Expedition. Additional diagnostic information and pictures are available on the Ford Expedition HeaterTreater Ebay listing or the web site at www.heatertreater.net. There is an inexpensive effective fix available that replaces the cheap plastic door with steel that will outlast the vehicle. cgallen
In the trunk, I think
Generally the problem is with a broken blend door, not a bad actuator motor. A solution is available at www.heatertreater.net and additional information can be found by checking my other posts on this forum. cgallen