Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description: Defrost

WARNING: This page is about a different car, the 2018 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.

When DEFROST mode is selected:

the mode doors direct airflow to the defroster duct and side window demisters. A small amount of airflow from the floor duct is present.
the recirculated air request button can not be enabled.
the A/C is automatically commanded on and remains on until the system is either turned off or the airflow mode has changed and the A/C button is pressed.