2007 Chevrolet Tahoe A/C Heater Blend Door Actuator; 2007 Chevrolet Tahoe Hose (Upper . During winter, the vehicles heater is needed to function optimally due to the very cold environment as opposed to summer. Do you think it is 100% the BCM or should I really do an in-depth check of that ground? 1. I would like to get this issue fixed. I can't figure out why the front will not blow any air from the vents, (warm or cold). When I turn on ac the front vents do not blow out any air. However, if you dont turn on the air conditioning on your Tahoe for a long time, the parts will stick. Connect the pressure gauge to the low pressure (L) port in Tahoe. Did you ever figure out what was wrong with your van? By knowing this, you have been able to acquire some DIY auto-repair skills. If there is no air flow or reduced air flow from the vents on your Chevy Tahoe, bad blower motor could be the culprit. Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. A worn out or weakened blower motor can also produce abnormal sounds when in operation. Blown fuse In any case, it is advisable for laypersons to visit a workshop. Monday, August 19th, 2019 AT 6:40 PM Someone is going to have to test while following a wiring diagram. But before you begin the replacement, it is highly recommended to disconnect the vehicles battery.Note: Vehicles with auto climate control may not have a blower motor relay. Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. However, if youre not sure of doing a perfect job, kindly contact an expert auto technician. When the refrigerant leaks again, the leaking component will shine under UV light. The result is a defective compressor that can no longer be repaired. - All You Need To Know. A struggling blower motor due to internal component degradation can put a lot of strain on the resistor when in operation, causing it to overheat and burnout. The two most prominent symptoms of a clogged up evaporator in Tahoe are: the air flow from the AC vents is choppy and not smooth, and the inside of the vehicle is developing a bad moldy smell. The function of the blower motor resistor is to control the speed of the blower motor. Could be fuses, either of the switches, the resister, the wiring or the blower motor itself. However, using cheap or homemade cleaning tools can make the job easy. When you have a clogged air conditioner vent, the difference in temperature circulation will make a part of the car cold while the other becomes hot. Therefore, the filter performance will not increase significantly even after cleaning. Had the compressor replaced in Aug 07. 2007 Chevy Tahoe with My front AC is not blowing. 1995 Chevy Tahoe 6 Cyl Automatic 200000 Miles When this component is faulty or clogged, it will be difficult to collect air. The refrigerant pressure is affected by the outside atmospheric temperature. Your cars air conditioning system works with refrigerant, which helps to circulate cold air through the cabin. If youre a DIYer, replacing this component can be pretty easy. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. If any of these two areas are blocked by debris or any other substance, the ventilation system of the car will not be able to blow air inside your vehicle. This problem can also occur if your vehicle has a faulty relay; the relay helps to provide the current needed for the blower motor to operate. Then remove the filter from its housing. #The air conditioning system consists of air control vents with a control door inside your vehicle on the dashboard. You cannot repair a broken blower motor, the part must be replaced with a new one. 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This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. One of the common reasons a compressor may go bad is due to lack of constant usage. This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. Take it from a guy that has been on both sides. Otherwise no problems. Does it have a white plastic half circle shaped gear on the outside of it? With that being said, you or someone else may have mistakenly closed these components on the dashboard; hence, the AC not blowing out in front vents. If he is not in the garage fixing challenging mechanical problems, he is writing automotive repair guides, buyers guides, and car and tools comparisons. The AC control heads are notorious for going out. The vacuum is created by the engine while driving. link to What is Inside a Catalytic Converter? If this is the case, carefully clean the vents with detergent and water solution using a foam paintbrush. But when it chooses to work, yes, you can hear . Welcome to rxmechanic.com. Blower motor resistor module. So, you will most likely experience a situation where the front AC blows cold, the rear AC blows hot, and vice versa. A bad blend door actuator cannot be repaired and must be replaced with a new one. Thanks for any help! Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. Rxmechanic.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon.com. However, due to excessive dust or dirt build-up, the air filter can be clogged over time, resulting in several malfunctions. A common symptom of a faulty blend door actuator in vehicles with dual zone climate control system is one side blowing hot air while the other side is blowing cold air. The pollen filter, also known as the cabin filter or microfilter, is a central component of the ventilation system in your Chevy Tahoe. 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What does the mode linkage look like? So, you should be attentive to these probable causes listed below: This is one area to check that might be responsible for your dashboard air vents not working. If the motor does not spin after directly connecting to the battery, it confirms that the blower motor is dead and should be replaced with a new one. A damaged belt can also lead to this issue. 2005 CHEVROLET TAHOE. You can test the relay by swapping it with other relays in the fuse box with similar amp rating. Turn on the multimeter and insert the probes into the connector, one at each point making sure the metal part of probes dont touch each other. If this motor fails, there will be no flow of air through the vents of your vehicle. My Air Connditioner Is Not Cooling. It is important that you enter this 100% correctly, otherwise the result of the search may be inaccurate. To know if your vehicles motor is faulty, you need to connect an amp meter to the blower motors power wire. 462.00 to get it fixed. Changing the setting allowed me to view the actuators movement. Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. You must log in or register to reply here. A torn hose can even lead to refrigerant leakage, which will reduce the effectiveness of your vehicles air conditioner. Ideally, the refrigerant should never leak in a properly sealed AC system, but most car AC systems do leak small amount of refrigerant over time due to minor imperfections and may need recharging after every few years. In other cases, the front AC may stop working with only the back AC working. It was very tight and sturdy. Failed condenser or compressor. Start by inspecting the condition of the cabin air filter on your Tahoe. Aside for checking the system for fault codes, I would suspect a faulty blend door actuator, or faulty expansion device. After cleaning up the dust or dirt, carefully wipe the vents with a dry towel. It will then start to blow cold again. That could be a plugged orifice tube or a problem with the temp blend door. However, lets consider one aspect of the problem, which is the common reason why a cars front AC fails to work. If there is no refrigerant in your vehicles cooling system, your conditioner cannot blow cool air. 232,000 MILES. Also, over time the bearings of the blower motor can lose their initial lubrication and begin to dry out, causing increased friction in the motor. During your diagnosis to find out why your cars front AC is not working, if you discover any leaking AC unit hose, ensure to seal it. If you are lucky, the wiring diagram will be drawn on the facing. We are an automotive mechanic blog that helps mechanics and car users to find the most recent and accurate technical and repair information for their cars. Z. The most common causes that hinders normal operation of air conditioning system on your Chevy Tahoe are dirty cabin air filter, refrigerant leak, dirty or clogged condenser, dirty or clogged evaporator, bad blower motor, defective compressor, faulty blend door actuator or any fault in the electrical system. The condenser takes the heat of the refrigerant by changing it from its gaseous state to a liquid state. . There are many reasons why the AC blower motor may not be working in your Chevy Tahoe. The pollen filter, also known as the cabin air filter or microfilter, is responsible for filtering the air that the passengers breathe in Chevy Tahoe. Use the thumbwheel to start and stop the airflow. If only hot air comes out of the air vents in your Tahoe, then the problem probably lies somewhere else. Osuagwu Solomon is a certified mechanic with over a decade of experience in the mechanic garage, and he has over five years of experience in the writing industry. I turned the ac switch off and proceeded to work with the windows down. If this is the case, the only option is to replace the broken part. If you do not see any volts, or if you only see volts at certain fan speed setting, it could be due to a bad resistor. I have a brand-new battery and alternator in it. Larger leaks may already be heard or you can find them with a leak detection spray. I have already checked freon and it is fine. Insufficient amount of refrigerant is still the main cause of a non-functioning AC system. The worst damage, however, is a failure of the AC compressor when it eats itself due to insufficient lubrication or a production error, metal chips form, which are distributed throughout the Tahoes AC system. 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