Running hot cold heater and air conditioner blend door failure is a common problem on many popular passenger car truck suv and van models.
Hvac air door actuator symptoms.
If the problem is due to a mode actuator failing then the entire actuator will need to be replaced to fix the problem.
An actuator can become faulty if the plastic gear set turns out to be fragile and it breaks.
As mentioned earlier a blend door actuator is linked to the air control door it rotates side by side with the electronic motor.
A symptom of this problem is an inability to effectively control the vehicle s interior temperature.
A plastic gear set is frequently rotated from one side to another by the electric motor.
The symptoms of a bad recirculation air door actuator are clicking noise coming from behind the dashboard.
On most vehicles the blend door hangs on a vertical or horizontal axis so turning.
Exhaust fumes inside the cabin.
The symptoms associated with this are often complaints that the front windshield is slow to defrost or remains foggy.
Those are some of the heater blend door actuator symptoms you need to watch out for.
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.
Automotive air door actuators.
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.
A blend door actuator is linked to an air control door pivot found on the last drive of the unit.
First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
You can usually diagnose and fix the problem yourself in about an hour.
Find the procedure in a shop manual at auto parts stores for about 20.
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.
Heating and air functioning is unpredictable.
Total failure of heating and air system.
An actuator can go bad in of two ways.
Causes of a bad blend door actuator.
Diagnosing the air conditioning air flow actuator the electronic actuator that controls the direction of airflow is called a blend door actuator.
What to look out for when dealing with hvac air door actuator issues.
Automotive air door actuators.
These symptoms are especially concerning when the warm summer months hit.
Also reprogramming or updating software of the hvac control module may correct issues listed as well.
A malfunction in modern electronic hvac air door actuators circuits or the a c actuators itself could prevent the hvac compressor from running.
Poor ac performance due to the outside hot air leaking into the hvac box and then the cabin compartment.
