![]() ![]() As with the blend door motor you'll hear a click or grinding sound as the gears strip trying to make the adjustments. Owners with dual zone systems often say the passenger side doesn't respond or becomes stuck in the cold or hot position. They often describe correct operation as intermittent. When this part fails drivers complain they can’t control the temperature the way they use to. Mechanics call this the lower actuator, because they mount the blend door motor mentioned above higher up on heater case. On the GMC Acadia and Chevrolet Traverse Sport Utility Vehicles this puts it on the passenger side of the automobile. ![]() It's very close to the air conditioning evaporator core and the heater core assemblies. They locate the temperature mode actuator assembly right where you think it should be. Finding the Temperature Mode Valve Actuator Assembly Although the internal components remain exactly the same, the case that holds them and the mounting holes differ between year, make and models. This actuator assembly might fit a few other models, but double-check the part numbers for your car. On the GMC Acadia and the Chevrolet Traverse the replacement part number for the blend door actuator is 15-73989. Parts counter people call this the upper actuator. This grind or click sound is actually the plastic gears stripping inside. When this device fails, you might hear a grinding sound that appears to be coming from behind the radio or entertainment system. The opposite complaint indicating the same problem is when all of the air flows out of the defroster vent despite the position selected on the air conditioning control panel. The symptoms associated with this are often complaints that the front windshield is slow to defrost or remains foggy. The electronic actuator that controls the direction of airflow is called a blend door actuator. Diagnosing the Air Conditioning Air Flow Actuator Electric power steering and drive-by wire throttle control actuators are just steps along the path to taking the human out of the driving equation. If you want driver-less cars in the future, everything needs to be electronically controlled. Sometimes the automakers are put into a situation where they have to use the general public as a test bed of new technology. Unfortunately, the early versions of this system weren't all that reliable. Some say they went with the troublesome system, so you can voice control it from the back seat of a driver-less car. Electrical signals rotate the motor until the doors pointing in the proper position. Now we have electronically controlled temperature door actuators and blend door controllers. Then they changed this to a vacuum system where you pushed a button and the vacuum signal performed the operation for you. In the early days we had reliable cables that manually operated the doors putting us in control. What has changed is the manner in which it's executed. Carmakers have used this basic design for 100 years. The blend door diverts the airflow to the defroster vents in the upper dashboard, the floor discharge for heat or the center vents for air conditioning. The temperature door diverts air over the evaporator for cool air or points the flow over the heater core for warm air. I'll keep it brief this time so we can get into the technical tips and diagnosis portion. Visitors to the website realize that I always want to tell you how the system works and why you have to suffer with the bad parts from the factory. People with the upgraded dual zone AC will have three.Īir Conditioning Blend Door Actuator Motor There are two of these troublesome beasts located in all General Motors vehicles. All of these problems come from devices known as actuator assemblies. In addition to these complaints drivers will often hear a grinding or clicking noise in the interior compartment. Often you can hear air escaping behind the dashboard or feel the air exiting the wrong locations. As an example, you may select defroster and it takes a long time for the windshield to clear. In addition, some owners may complain that the air doesn't come out in the right spot. It seems that most of the complaints are on split systems where the passenger side doesn't respond to the adjustment. Use this guide if you can't control the temperature in your vehicle. Long story short, there’s something in this article for anybody with this problem. We'll also cover replacement tips and the important calibration process common across the General Motors line up. However, other popular GM models have the same issue. temperature control and blend door problems on the GMC Acadia and the Chevrolet Traverse. This page concentrates on General Motors Corp. Get the temperature control working again on your SUV. GM Temperature Control and Blend Door Problems ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |