1993 Buick LeSabre Owner's Manual - Page 123

Auto When the system is set for automatic, air will come from the floor outlets, the instrument panel outlets, or both. Fan speed will vary (unless a blowerLO or HI button has been pushed) as the system getsto and maintains the temperature setting you have selected. The display will show the set temperature and blower speed. In cold weather the system will delay turning on the fan, to avoid blowingcold air. The length of the delay depends on engine coolant temperature, outside temperature, and time since the enginewas last started. Pushing a LO or HI blower button will override this delay, and cause the fan to start. To rid the system of stale air in warm weather, air will come outof the floor outlets for a short time. Dual Zone ____ The front seat passenger can control air temperature in their seating area. The air temperature for right side of the front seat the can be set using the control on the passenger's door. Both DUAL ZONE and AUTO buttons will light up. To turn off this part of the system , push the DUAL ZONE button again. 121