Blower Motor Resistor
WARNING: This page is about a different car, the 2015 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.
The blower motor resistor uses 3 resistance elements mounted on a resistor board to provide 4 blower motor speeds. Depending on the heater blower motor switch position, series resistors are added or bypassed in the blower motor resistor to decrease or increase blower motor speed.