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. There are other names such as temperature door etc. Ac delco hvac door actuator. 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.

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. Sometimes the fix needs recalibration and sometimes you need to replace the part that is broken. Motors modules that accomplish the job. The blend door blends or mixes the hot air with the cold air.

A blend door actuator controls the temperature and the flow of the air in a car. A certain method to move a blend door a couple of systems would take more than a little time and effort to control. If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit. And what causes them to mess up.

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. Long gone are the cables and rods jutting out of the firewall. These obstructions can include. These days it s electrically driven actuator.

Auto heat built in heating systems have pretty much been standard equipment on most automobiles since the 1950s and 1960s. A blend door is short for blend air door. 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. 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 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. There usually is an actuator motor. To operate the heater control valve or a vacuum unit pulling a.