Function Selector Modes: Off

In OFF mode, recirculated/fresh air door vacuum motor receives full vacuum (recirculate mode). Defrost and floor vacuum motors receive full vacuum, closing off airflow to defroster outlets. Vacuum is not applied to panel door vacuum motor. All recirculated airflow is directed to the floor outlets. Temperature can be adjusted to desired setting. Blower motor is off.

MIX 

In MIX mode, outside air is allowed into systemand is routed to all outlets. Vacuum is not applied to recirculated/fresh air, panel and defrost door vacuum motors. The floor door motor receives partial vacuum. Blower motor speed and temperature can be adjusted to desired settings.