1994 Buick Roadmaster Owner's Manual - Page 132

From the AUTO mode, pushingthe temperature to 90°F will automatically allow the system to select the high blower and floor mode. From AUTO mode,pushing the temperatureto 60°F will automatically allow system to select high the blower, MIDDLE mode and recirculate air. 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 HI (unless a blower LO or button has been pushed) as the system gets to and maintains thetemperature setting you have selected. " Off When the system isoff, the ' ventilation allowsair to flow 'through heater the ducts while the vehicle is moving. The display will show the selected temperature and blower speed. In cold weatherthe system willdelay turning onthe blower, to avoid blowing cold air. The length of the delay dependson engine coolant temperature, outside temperature and time since the engine was last started. ' The exterior temperature will show in the display area. Pushing a LO or blower button will override this. HI delay, andturn on the blower.