What Does A Ac Heater Blend Door Actuator Do

First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.

What does a ac heater blend door actuator do.

A plastic gear set is frequently rotated from one side to another by the electric motor. A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit. In this video i explain how to replace the a c blend door actuator. If you have air flow but it is not cold check the blend door for operation first.

You can usually diagnose and fix the problem yourself in about an hour. An actuator can go bad in of two ways. With the combination of both systems the blend door actuator controls the conditioned air s temperature and leads it to the needed location. A blend door actuator controls the temperature and the flow of the air in a car.

Once the vehicle warms up the blend door may be moved to divert only part of the heated air into the cabin. A new door actuator costs less than 100. Find the procedure in a shop manual at auto parts stores for about 20. Directs the direction of air i e defroster dash vents floor vents etc.

There are a number of doors that direct the airflow of your hvac system. If your vehicle is only releasing cold air or if you are not able to change the airflow it may be because of a malfunctioning actuator. But if your car heater blows cold air and you ve checked both heater core hoses to make sure they re hot you likely have a bum blend door actuator. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken.

And what causes them to mess up. When cool air is desired a blend door is closes so that no heat enters the passenger area. As of 2013 the air conditioning and heating systems in many automobiles share a lot of elements such as the duct work under the dash the control of temperature on the dash s face. Blend doors move by way of a mechanical device referred to as an actuator.

Hope y all enjoy this video and let me know what y all t. Directs the flow of the hot and cold air. An actuator can become faulty if the plastic gear set turns out to be fragile and it breaks.