Air Blend Door Actuator Problem

The plastic doors break over time like bending a coat hanger back and forth.

Air blend door actuator problem.

The electronic actuator that controls the direction of airflow is called a blend door actuator. The symptoms associated with this are often complaints that the front windshield is slow to defrost or remains foggy. A plastic gear set is frequently rotated from one side to another by the electric motor an actuator can become faulty if the plastic gear set turns out to be fragile and it breaks. The control unit goes through this calibration process approximately every 20 times the vehicle is started.

The root cause of most blend door problems is the overstress on the blend door during this calibration process. Blend door actuator locations begin by identifying the problem either defrost mid or floor or temperature modes not working. 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. The thought of trying to troubleshoot the mass of wires hoses and duct work under your dashboard to fix the problem may be daunting.

You can get the motorcraft actuators much cheaper than the ford dealer here on amazon check fitment guide http amzn to 1sxtnld one bit of advice i can gi. On this video we showing how to troubleshoot a problem with the air conditioning main blend door on a 2002 ford f150 we found a bad blend door actuator moto. The actuator motors may also make a noise if they ve failed but this isn t always the case. Use a test light or power probe and verify that the proper signal is being received to the actuator based on your wiring diagram.

There is a replacement mode or blend actuator available at most auto parts stores dorman part 604 107 price 39 99. The blend door actuator is located in the center of the core box up under the dash. A blend door actuator is linked to an air control door pivot found on the last drive of the unit. These units can be either hanging in front of you or in a little more obscure places such as on the side the hvac plenum.

The blend door actuator is most of the time at least accessible for testing but sometimes removal of the dash is necessary for replacement. Then locate and identify the actuator to be replaced.