1993 Buick LeSabre Owner's Manual - Page 125

c I I L I If you want to raise the blower speed, push the HI button. The blower speed will increase with every push of the button until maximum speed is reached. Ht r 1 HTR E To warm the air,press HTR and adjust the temperature and fan speeds for your comfort. Most of the air will come from the floor outlets. Econ ECON r You can use ECON when you don't need to cool the outside air. The system will work like the AUTO mode without cooling. The air Defog When the outside temperature is mild, use DEFOG to keep fog off the windshield.