2012 Acura MDX Owner's Manual - Page 193

Climate Control System Recirculation Button Mode Control When the indicator in the button is on, air from the vehicle's interior is sent throughout the system again. When the indicator is off, air is brought in from the outside of the vehicle (fresh air mode). The outside air intakes for the climate control system are at the base of the windshield. Keep this area clear of leaves and other debris. The system should be left in fresh air mode under almost all conditions. Keeping the system in recirculation mode, particularly with the A/C off, can cause the windows to fog up. Switch to recirculation mode when driving through dusty or smoky conditions, then return to fresh air mode. Use the mode control button to select the vents the air flows from. Some air will flow from the dashboard vents in all modes. Air flows from the center and corner vents in the dashboard. Airflow is divided between the vents in the dashboard and the floor vents. Air flows from the floor vents. Airflow is divided between the floor and corner vents and the defroster vents at the base of the windshield. Windshield Defroster Button When you select , the system automatically switches to fresh air mode and turns on the A/C. For faster defrosting, manually set the fan speed to high. You can also increase airflow to the windshield by closing the corner vents on the dashboard. To close the vents, rotate the wheel under each corner vent. When you turn off by pressing the button again, the system returns to its former settings. For your safety, make sure you have a clear view through all the windows before driving. When the indicator in the button is on, the front passenger's and rear passenger compartment temperatures cannot be set separately from the driver's. Rear Window Defogger Button This button turns the rear window defogger on and off (see page 132). Pushing this button also turns the power mirror heaters on and off. This button directs the main airflow to the windshield for faster defrosting. It also overrides any mode selection you may have made. 186