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Manually turn blend door. How to Reset a Blend Door Actuator
- Is It Possible to Manually Flip a Blend Door Actuator?
How To Reset A Blend Door Actuator - Mechanic Base.
It helps to run the blend doors, which combine the cold and hot air together to reach the appropriate temperature. The actuators are responsible for managing several modes, including defrost, floor, vent and bi-level coverage. So, if you choose the vent setting, the actuator will adjust the door, so the airflow is directed out of the dashboard vents.
To reset a blend door actuator, you must remove the actuator, turn on maximum heat on the climate control. Turn the blend door shaft until maximum heat comes from the vents, then reinstall the actuator. Finally, turn on the air conditioner and test the blend door actuators before putting everything back together. However, in some modern car models, the blend door actuator reset can be done just electronically with a diagnostic tool , so you want to check if this is possible in your car model first.
Depending on what type of vehicle you drive, there could be one or two blend doors. They can be found on both the driver and passenger sides. You want to reference the service manual to get more information. In many cases, it is found near the rear of the stereo setup, at the center of the dashboard.
You may need to remove some bolts on either side to take out the console. Once the stereo is out, you should see the actuator assembly. The next step is to remove the actuator from the shaft. Make sure the actuator and blend door shaft move freely. If the mixing door shaft does not move freely, you may need to make more diagnoses and lubricate the blend door. It is now time to turn on the car engine to get some heat in the car.
Start the engine and make sure the parking brake is engaged. Either you want to do this outdoors or make sure to have good ventilation where the car is going. With the accessories powered on, you should be able to switch the air conditioning system on. Use the knob or controls to turn it on. Allow the engine to warm up and try moving the mixture door actuator in both directions to see which direction you get heat blowing from the vents and in which direction you get cold air.
Allow each function to run for a couple of minutes before switching it again to be sure. Turn the blend door shaft to the direction where the most heat is coming from the vents and ensure again that the max heat is selected on the climate control unit. Reinstall the blend door actuator and try different settings on the climate control to ensure both cold and warm air is coming. Make sure everything is secure and try out the air conditioning system once again.
The actuator is a small component and can be easily broken. Otherwise, the air conditioning system might not operate the way you planned. In most cases, the module will force recalibration at the beginning of ignition.
However, you may need to manually recalibrate it if you hear unusual clicking or noises during this startup time. Those noises could have something to do with the actuator getting stuck. However, resetting the actuator might be enough to fix it. Additionally, you should always consider the possibility that failure is due to contaminated tracing pins.
These are found near the back of the output shaft. In this case, you must only wipe the pins clean and reset the actuator to get running again. If the actuator is the issue you need to remove the glove compartment by removing the 6 screws that hold it in place, then you will see the actuator on the side of the HVAC case, Remove the wire connector and the 3 screws that hold the actuator. Now install the replacement actuator and initialize it.
To do that you need a scan tool that has the correct special function to re-calibrate them. Sometimes you can get them to initialize if you remove the HVAC fuse with all of the controls turned to full off and low. Then put the fuse back in and the actuators may initialize themselves. This is sort of hit or miss as to working. Images Click to enlarge. Was this answer. Please login or register to post a reply.
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