What Does A Ac Heater Blend Door Actuator Do

A blend door actuator controls the temperature and the flow of the air in a car.

What does a ac heater blend door actuator do. Blend actuator helps combined cool and warm air to produce the proper desired temperature. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken. An actuator can become faulty if the plastic gear set turns out to be fragile and it breaks. There s a chance the mode or blend door actuator may be good but the door or linkage is binding so check it before you replace the actuator photo above.

As the blend door open or closes to the heat or cold position it opposes the flow of air coming from the blower motor and makes a change in the intensity of the air noise. What is a blend door. A blend door actuator is linked to an air control door pivot found on the last drive of the unit. Heater control actuator regulates flow of hot air when heater is engaged.

Both terms mean the same. If you can t hear this change in air noise intensity there is a problem with the blend door actuator the blend door the climate control set or the circuit connecting them. A sure way to move the blend door some systems took more than a little effort to operate. An actuator moves the blend door automatically.

If the door binds take it to a pro for replacement. This commonly causes problems in most car s air conditioner and. A plastic gear set is frequently rotated from one side to another by the electric motor. An actuator can go bad in of two ways.

Install it and test the operation. As autos had more and more labor saving devices added as standard equipment heater and air conditioning controls could be operated with less effort when automakers started installing blend door actuators. 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. A blend door moves to vary the amount of air passing through the vehicle s heater core.

The blend door is also referred to by some car makers as an air mix door. However if it moves smoothly buy a new blend door actuator from the dealer or auto parts store. Mode actuator determines where the air will blow out of such as the floor vents the top vents or the defrosting vents that blow onto your windows and windshield. 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.

With the combination of both systems the blend door actuator controls the conditioned air s temperature and leads it to the needed location. First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.