A/C-Heater Control Panel: RECIRC
WARNING: This page is about a different car, the 1999 Buick LeSabre. However, it is still accessible from the selected car via links, so may be relevant.
Blower is turned on and speed can be adjusted using fan speed control. Compressor can be activated by selecting A/C button. Interior air is pulled into system by blower. If A/C is selected, air is cooled and dehumidified, then heated as necessary, and forced out of dash outlets. See Figure.