Car AC Blower Motor

The heater blower motor fan motor is a component of an automatic AC system. When the heating system is operating, the motor blows heated air through the ventilation holes. Conversely, some blower motors blow out cold air when the air conditioning system is running. There are two main types of fan motors: single speed motors and variable speed motors. Single speed blower motors blow air at one speed. Variable speed motors adjust their speed to blow out air at different speed levels. A properly functioning fan motor remains an essential component of your automotive AC system. The blower motor is vital to keeping your vehicle at a comfortable temperature.


Thermostats work with automatic heating and cooling systems to control the temperature. When the temperature drops below the thermostat set point, this signals the oven that it has started operating. The oven creates hot (or cold) air that must then circulate throughout the entire cabin. This is when the radiator fan motor turns on.

The blower motor takes the heated or cooled air generated in the oven and circulates it throughout the machine to ensure that the temperature reaches what is required at the thermostat. It does this by rotating a fan, which blows air through your vehicle’s ventilation system. Even a small fan motor can move a large volume of air.

Single speed motors run at one speed and run at full power when in use. The thermostat tells your fan motor when to turn it on and off. Sometimes single speed motors cause cold spots because they only run on a thermostat signal. Conversely, variable speed motors blow air out at a higher or lower speed if desired. Thus, this motor helps to create a more even temperature distribution throughout the vehicle. In addition, variable speed engines are generally more energy efficient than single speed engines, which helps save on gasoline.

Post time: Oct-12-2020