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.
Hvac air door actuator symptoms.
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.
These symptoms are especially concerning when the warm summer months hit.
You can usually diagnose and fix the problem yourself in about an hour.
Symptoms a blend door actuator is bad.
For instance if the air door controls how much air moves across the heater core the hvac air door actuator would move the door when the temperature.
If the problem is due to a mode actuator failing then the entire actuator will need to be replaced to fix the problem.
Here are some of the most common symptoms that a blend door actuator has gone bad.
If the plastic gear breaks this might affect the blend door.
On most vehicles the blend door hangs on a vertical or horizontal axis so turning.
Total failure of heating and air system.
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.
The hvac air door actuators will respond to this input by following their programming and changing the position of the air doors inside the hvac ducts to accommodate the request of the passenger.
What to look out for when dealing with hvac air door actuator issues.
An actuator can go bad in of two ways.
Causes of a bad blend door actuator.
A new door actuator costs less than 100.
Poor ac performance due to the outside hot air leaking into the hvac box and then the cabin compartment.
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 malfunction in modern electronic hvac air door actuators circuits or the a c actuators itself could prevent the hvac compressor from running.
Automotive air door actuators.
The symptoms of a bad recirculation air door actuator are clicking noise coming from behind the dashboard.
Find the procedure in a shop manual at auto parts stores for about 20.
A symptom of this problem is an inability to effectively control the vehicle s interior temperature.
Those are some of the heater blend door actuator symptoms you need to watch out for.
Often adjusting the temperature settings ever so slightly can stop the noise temporarily.
Also reprogramming or updating software of the hvac control module may correct issues listed as well.
Exhaust fumes inside the cabin.
If you hear a repeated light clicking sound coming from under the dash it can be a bad blend door actuator.
Heating and air functioning is unpredictable.
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.
