Blower Motor Switch: Description and Operation

If the heater blower motor switch is positioned in AUTO, the system automatically chooses an appropriate fan speed to maintain the desired set temperature.
^ During cool/cold weather, if PANEL or FLOOR is selected, the blower motor will stay off (when in AUTO) until the engine is warm enough to provide heat.
^ The fan speed can be changed to a fixed setting by rotating the heater blower motor switch to the desired position.