It could be the blower resistor.
Ford escape blower resistor location.
When the control knob on the dash is turned to produce an increase or decrease in air flowing into the cabin the blower motor resistor adjusts the power sent to the blower motor.
It ll have a plug with several wires and usually 2 screws holding it in.
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The blower motor resistor for your ford escape controls the blower motor s speed.
2014 ford escape blower removal.
This a how to video for replacing a motor blower resistor in a 2010 ford escape.
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You will need to replace this part if your fan does not work at all settings.