1993 Buick Roadmaster Owner's Manual - Page 131

Off When the systemis off; the ... Auto When the systemis set for automatic, aitwill come from thefloor o,utlets,. the instrument panel outlets or both. Fan speedwill vary (unless a blower LO or HI bukon has been pushed) as the system getsto and m,aintaigsthe temperature '; .setting'you have .selected: .. ... '. '. , The display will show the selected,temperature and blower speed. , .In cold .weather the system will delay. turning on the' blower, to avoid blowing cold air. length ofthe. The delay dependson engine coolant temperature, .outside temperature and time sincethe engine was last: stafted.