What Does A Hvac Heater Blend Door Actuator Do

In this video i explain how to replace the a c blend door actuator.

What does a hvac heater blend door actuator do.

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. If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit. Auto heat built in heating systems have pretty much been standard equipment on most automobiles since the 1950s and 1960s. Long gone are the cables and rods jutting out of the firewall.

And what causes them to mess up. Motors modules that accomplish the job. Blend door actuator in some car models manufactured before 1980 the blend door might have been activated by metal cables which were directly connected to the lever of temperature control on the dash. These days it s electrically driven actuator.

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. Ac delco hvac door actuator. Hope y all enjoy this video and let me know what y all t. 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. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken. These obstructions can include. There usually is an actuator motor.

The blend door blends or mixes the hot air with the cold air. 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. A blend door is short for blend air door. 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.

There are other names such as temperature door etc. To operate the heater control valve or a vacuum unit pulling a. Pen tooth pick small toy or bubble gum to name a few.