A symptom of this problem is an inability to effectively control the vehicle s interior temperature.
Hvac air door actuator symptoms.
Running hot cold heater and air conditioner blend door failure is a common problem on many popular passenger car truck suv and van models.
A plastic gear set is frequently rotated from one side to another by the electric motor.
Those are some of the heater blend door actuator symptoms you need to watch out for.
You can usually diagnose and fix the problem yourself in about an hour.
The symptoms associated with this are often complaints that the front windshield is slow to defrost or remains foggy.
Causes of a bad blend door actuator.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
These symptoms are especially concerning when the warm summer months hit.
As mentioned earlier a blend door actuator is linked to the air control door it rotates side by side with the electronic motor.
An actuator can go bad in of two ways.
Heating and air functioning is unpredictable.
Stuck closed or open temperature blend door because of bad blend air door actuator could mislead a customer or even a mechanic to believe that there is a problem with the a c compressor or.
A malfunction in modern electronic hvac air door actuators circuits or the a c actuators itself could prevent the hvac compressor from running.
An actuator can become faulty if the plastic gear set turns out to be fragile and it breaks.
If the plastic gear breaks this might affect the blend door.
The symptoms of a bad recirculation air door actuator are clicking noise coming from behind the dashboard.
What to look out for when dealing with hvac air door actuator issues.
The symptoms listed can be replicated by a broken blend door blockage in the air ducts or bad sealing foam pads where the blend door seats against.
Find the procedure in a shop manual at auto parts stores for about 20.
On most vehicles the blend door hangs on a vertical or horizontal axis so turning.
Automotive air door actuators.
A blend door actuator is linked to an air control door pivot found on the last drive of the unit.
Diagnosing the air conditioning air flow actuator the electronic actuator that controls the direction of airflow is called a blend door actuator.
Automotive air door actuators.
A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit.
But if your car heater blows cold air and you ve checked both heater core hoses to make sure they re hot you likely have a bum blend door actuator.
Total failure of heating and air system.
Exhaust fumes inside the cabin.
Also reprogramming or updating software of the hvac control module may correct issues listed as well.
