Heater Blend Door Actuator Symptoms

Here are some of the most common symptoms that a blend door actuator has gone bad.

Heater blend door actuator symptoms. One of the symptoms is a noisy repetitive sound at the back of the glovebox center dash console section where the hvac knobs are based. There should be controlled by some plastic gears that are responsible for moving the blend door where the actuator sends the correct signals. A symptom of this problem is an inability to effectively control the vehicle s interior temperature. As mentioned earlier a blend door actuator is linked to the air control door it rotates side by side with the electronic motor.

Those are some of the heater blend door actuator symptoms you need to watch out for. If you hear a repeated light clicking sound coming from under the dash it can be a bad blend door actuator. The temperature door diverts air over the evaporator for cool air or points the flow over the heater core for warm air. 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.

Auto heat built in heating systems have pretty much been standard equipment on most automobiles since the 1950s and 1960s. The blend door is called a door because it really is just a flat panel of plastic. 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. The blend door which the actuator controls is what diverts and controls the flow of air.

These obstructions can include. How to diagnose if you have a bad blend door actuator. Symptoms a blend door actuator is bad. If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit.

On most vehicles the blend door hangs on a vertical or horizontal axis so turning. The blend door diverts the airflow to the defroster vents in the upper dashboard the floor discharge for heat or the center vents for air conditioning. Carmakers have used this basic design for 100 years. Often adjusting the temperature settings ever so slightly can stop the noise temporarily.

Pen tooth pick small toy or bubble gum to name a few.