The function of the car blower is to blow the cold air above the air conditioning evaporator or the hot water of the warm water tank into the car. There is nothing in the blower as a motor. Turn on the blower (the air conditioner's blower switch). If the temperature is selected to be the lowest temperature, the external circulation is the natural wind temperature outside the car, but it will be slightly higher, because the air inlet of the external circulation of the air conditioner is basically under the front windshield and the engine compartment Between the temperature that will be brought into the cabin. Turn on the air conditioning (A / C) switch. If it is automatic air conditioning, the blower will automatically start to supply air; if it is manually switched, generally the air conditioning compressor will start to work after the blower is turned on.