What Does A Ac Heater Blend Door Actuator Do

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.

What does a ac heater blend door actuator do.

An actuator can go bad in of two ways. Also called hvac actuators these small electric motors control the flow and blend of hot and cold air to the passenger areas by opening and closing the vent doors that. A blend door actuator is linked to an air control door pivot found on the last drive of the unit. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken.

A plastic gear set is frequently rotated from one side to another by the electric motor. There are a number of doors that direct the airflow of your hvac system. Blend doors move by way of a mechanical device referred to as an actuator. Directs the flow of the hot and cold air.

You can usually diagnose and fix the problem yourself in about an hour. First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or. A blend door actuator controls the temperature and the flow of the air in a car. And what causes them to mess up.

Find the procedure in a shop manual at auto parts stores for about 20. Once the vehicle warms up the blend door may be moved to divert only part of the heated air into the cabin. If you have air flow but it is not cold check the blend door for operation first. 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. Directs the direction of air i e defroster dash vents floor vents etc. A new door actuator costs less than 100. 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. If your car or truck passengers don t seem to be getting all the benefits of your vehicle s heating or a c system you could have a non working a c heater blend door actuator. With the combination of both systems the blend door actuator controls the conditioned air s temperature and leads it to the needed location.