What Does A Hvac Heater Blend Door Actuator Do

And what causes them to mess up.

What does a hvac heater blend door actuator do.

A somewhat common problem in vehicles a few years old the heat and air system in your vehicle may be the victim of a faulty blend door actuator. In this video i explain how to replace the a c blend door actuator. A blend door is short for blend air door. There are other names such as temperature door etc.

The electric motor that powers the actuator controls the flow and blend of hot and cold air within the cabin by opening and closing the vent doors. Motors modules that accomplish the job. These days it s electrically driven actuator. If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit.

Ac delco hvac door actuator. If you cannot move the blend door an obstruction has gotten in the way of the door movement which will make the new actuator fail. A certain method to move a blend door a couple of systems would take more than a little time and effort to control. To operate the heater control valve or a vacuum unit pulling a.

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. Long gone are the cables and rods jutting out of the firewall. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken. There usually is an actuator motor.

Auto heat built in heating systems have pretty much been standard equipment on most automobiles since the 1950s and 1960s. An hvac heater blend door actuator is what moves the blend door to divert warm or cool air into differ ent passages within the hvac system and keep the passenger cabin at the desired temperature. 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. Hope y all enjoy this video and let me know what y all t.

Pen tooth pick small toy or bubble gum to name a few. These obstructions can include. 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.