Hi,
It sounds like there is a problem with what is called the mode door actuator. First, take a look through this link and see if it helps.
https://www.2carpros.com/articles/air-vents-stay-in-the-defrost-position
This particular vehicle has a mode door actuator specific to the defroster. Here are the directions for removal and replacement. Note: I'm not saying it's bad, but it would be a good idea to remove it and see if it is functional.
The attached pics correlate with the directions.
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2013 Ford Truck Escape 4WD L4-1.6L Turbo
Mode Door Actuator - Defrost Door
Vehicle Heating and Air Conditioning Air Door Actuator / Motor Service and Repair Removal and Replacement Dual Automatic Temperature Control (DATC) Mode Door Actuator - Defrost Door
MODE DOOR ACTUATOR - DEFROST DOOR
Mode Door Actuator - Defrost Door
Removal
NOTE: Removal steps in this procedure may contain installation details.
1.
pic 1
2.
pic 2
3.
pic 3
4.
pic 4
Installation
1. To install, reverse the removal procedure.
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Let me know if this helps or if you have other questions.
Take care,
Joe
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Tuesday, December 8th, 2020 AT 6:24 PM