I would like to get this issue fixed. Ugh. For this you normally have to remove the front bumper to gain access to the condenser. So, even if you recharged your Tahoe AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. 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. There are many reasons why the AC blower motor may not be working in your Chevy Tahoe. The vacuum is created by the engine while driving. So, if your cars AC is not cooling as expected, ensure to check the air filter, among other related components. Need to fix your car's air conditioner? After cleaning up the dust or dirt, carefully wipe the vents with a dry towel. If the condenser is dirty on your Tahoe, the simplest solution is to clean it. When this component is faulty or clogged, it will be difficult to collect air. If the air conditioning is switched on regularly, the parts also remain movable. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Sometimes changing the temperature can temporarily stop the sound. - All You Need To Know. Nothing happening in back. Thanks for any help! Sep 30, 2008 #3 T tspain Full Access Member Joined Apr 16, 2008 My Air Conditioner cools fine and then it will blow warm air for awhile. So, all of them must be inspected when diagnosing poor air flow. I installed the resistor and now the REAR AC works fine, but the front AC still doesn't work and there is absolutely no air blowing from the front vents. Instead of changing the cabin air filter in Tahoe, it is often recommended to first clean the filter. Yesterday it stopped putting out cold air completely. Some of the common reasons why youre experiencing a situation offront AC not working but back ishave been exposed in this article. One of such malfunction is the impact it has on the air conditioners ability to cool properly. When the refrigerant level in your vehicle is low, you will need to notice a significant reduction in the cooling effect of the air blown into the vehicle. Well, that picture pretty much clears up how it works. Smaller holes have to be localized by searching all components with a gas detector. #5. As a rule, there is no avoiding a change. If there isnt enough oil added with the refrigerant or to the compressor itself if it was replaced, the internal components of the compressor will wear out and cease to function. Ensure to prevent water from entering the vents directly; hence the need to ensure that the detergent and water solution form lather. The condenser receives proper cooling from the fan to convert the high-pressure gas it receives from the compressor into liquid. 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This can happen due to a leak or if the AC has not been recharged for a long time. I have a 2003 Chev Tahoe z71 with 88,000 miles. Just have it refilled and you can drive with pleasant temperatures again. And Yes, this can be used for most vehicles: Note that you have to be very careful in doing this; if this is not done properly, you might risk incurring more damages. 232,000 MILES. Prior to the battery going dead, I had no problems with the AC. You cannot repair a broken blower motor, the part must be replaced with a new one. Having the same problem, Front blower goes off with AC and rear fan still on when Idle for more than 15 mins and outside temp above 85 degrees or so. Over time, these particles build up on the fins and block the air flow through the evaporator, causing reduced air flow in the cabin and poor cooling. 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 will need recharging after every few years. It is important for you to properly diagnose the actual cause of the problem before acting. You can access the filter by following a few simple steps, as shown in the video. If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. If you work on other areas like cleaning the vents, topping off the refrigerants, etc., and you have a blown fuse, the AC will not work. The result is a defective compressor that can no longer be repaired. What does the mode linkage look like? First of all, you must ensure that you prevent your cars AC compressor from going bad. After The First Stop, I Got Back In And It Was Blowing Warm Air. 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 otherwise it will short out and blow up the fuse, and may cause damage to the vehicles electrical system. Since Chevy Tahoe is equipped with on-board diagnostics (OBD), a fault diagnosis can provide initial indications of where the malfunction is located in the air conditioning system. Welcome to rxmechanic.com. When this happens, it becomes difficult for air to circulate appropriately within the air conditioner system. In order to find leaks in the air conditioning system, a leak search is carried out in the workshop using forming gas even the smallest leaks can be detected. Over time, these dust particles can builds up on the fins and block the air flow through the evaporator, resulting in poor cooling. Although blocked vents can sometimes also be a culprit; however, you can blame a low refrigerant level nine times out of ten. 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Blown fuse That's an impressive piece of work :shades: . When a blower motor goes bad, it usually makes unusual noises when in operation, and the passengers may feel reduced air flow from the AC vents. I removed driver lower dash panel, sub panels and the 3 air/mixer actuators are visible and easy to get to. Hence, the system may blow cold air from one side while the other side fails to cooperate. Thank you so much. Use the thumbwheel to start and stop the airflow. If youre experiencing this challenge, ensure to consult an expert auto mechanic to check it out and rectify the problem immediately. Either way if the compressor comes on it rules out the control head being the cause of the compressor not engaging. This hinders the condensers ability to release heat as less air passes through the mesh, which results in poor cooling in the cabin. 2007 Tahoe. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin. If you are a DIYer, ensure to get a voltmeter to test for the blown fuse in order to replace it. It looks like you're new here. Just had another(2nd tine in a year) New compressor put in (1st one took 11 years to go out ), cold blows in front. Dash vents, floor vents, defrost, etc). If the condenser is damaged or blocked, it can cause your car to overheat while the AC is on due to inadequate air flowing to the air . A professional mechanic can swiftly diagnose the poor AC cooling issue for you. Front was not blowing air only the rear. Dealer or do it myself. Proper diagnosis is the first step to fixing any of the problems above. The sealant and labor costs will not affect your pocket so much. They replaced the compressor and no cold air still only warm air. Various lights flickering is a symptom to look at for that problem and this could cause the compressor not to engage. You could have excessive moisture in the system in which case the receiver dryer needs to be changed or it could be a malfunctioning pressure switch or thermostatic switch at the evaporator. The catalytic converter is a critical component of your car's exhaust system that helps minimize the amount of toxic gas released into the atmosphere. Therefore, the filter performance will not increase significantly even after cleaning. Well if you have another car to drive while your tahoe is MIA, i would recommend that. No air, no sounds NOTHING. The Back A/c Blows Good And Is Cool But Not As Cold As Before. If you look up under the dash from the driver's side, you should be able to see the mode linkage and you may be able to help it along. Aside for checking the system for fault codes, I would suspect a faulty blend door actuator, or faulty expansion device. This information is typically located under the hood and/or in the owners manual. You see, that was not so difficult. Monday, August 19th, 2019 AT 6:39 PM Much thanks. Front was not blowing air only the rear. When looking for the reason, you should always start with the most obvious cause, low refrigerant level in the system. The pollen filter, also known as the cabin filter or microfilter, is a central component of the ventilation system in your Chevy Tahoe. You will notice specks of dust and debris on its surface if you have not cleaned the filter in a long while. Therefore, when your cars AC starts running on a low refrigerant level, it will be difficult to circulate the cold air flow properly. However, if the blower motor cannot function, then no cool or hot air will be blown inside your vehicle when you turn on the air vents. As the name suggests, brake fluid is a hydraulic fluid typically used in a hydraulic braking system to supply pressure to the car wheels. 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. I Checked The 25 Amp Fuse Still No Blowing In Rear Of Car. By knowing this, you have been able to acquire some DIY auto-repair skills. 1. After replacing the battery, the motor idled a little bit rough for a few seconds, but then normalized. When I turn on ac the front vents do not blow out any air. "2007 chevy tahoe ltz--rear air works ---front air does not work." Hi! You must log in or register to reply here. If the thumbwheel is wheeled to the right, it will make the vents fully open the vents while the opposite direction closes the vent of your vehicle. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. However, using cheap or homemade cleaning tools can make the job easy. During winter, the vehicles heater is needed to function optimally due to the very cold environment as opposed to summer. Keep in mind that reduced air flow doesnt always indicate a problem with the blower motor, as it can also happen due to a clogged cabin air filter, dirty evaporator, or a bad mode door actuator. Meanwhile, the car makes and model can also impact the cost of repair. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. One intake is for fresh air from outside your vehicle, while the other is for re-circulated air. All you need to do is follow the right process. It would be best to contact an expert auto technician to diagnose and fix this problem as soon as possible. I KNEW the AC system was properly charged before I attempted this. Mechanic's Assistant: When it comes to this particular vehicle, have flat tires been a problem in the past? If it is not there, these gases released from Will Brake Fluid Remove Paint? When you turn on the AC fan in your Tahoe, and the air does not flow out of the vents, or the airflow is poor or inconsistent, it could be due to a broken blower motor. If the compressor fails, the AC will only blow warm air. Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. Once you ascertain the exact reason why your Dodge Durangos front AC is not working but back is, then you can proceed to fix the problem. 2007 Chevrolet Tahoe A/C Heater Blend Door Actuator; 2007 Chevrolet Tahoe Hose (Upper . This is because the air conditioner system is largely electronic. Home Troubleshooting Chevy Tahoe AC blower motor not working causes and diagnosis. Less common causes are clogged expansion valve or orifice tube, overcharged oil, faulty blend door actuator, or a defect in the climate control unit. I have the same problem in a customer's 2000 T&C. It may not display this or other websites correctly. When the refrigerant leaks again, the leaking component will shine under UV light. Erratic dash cluster behavior, T/C, Brake light, ABS light, dash lights, door & windows do not work, Constant chime, radio goes off,gauges fail. However, lets consider one aspect of the problem, which is the common reason why a cars front AC fails to work. You can use pressure washer for cleaning, but make sure its at low pressure setting, as high pressure can damage the delicate fins on the condenser. Remember cruising downtown on a hot and sunny or driving on a snowy day, then suddenly your dashboard air vents are not working. The most common reasons a Chevrolet Tahoe ac isn't working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor. AC worked just fine until May 08. I guess you are referring to the front hvac blower not blowing air at any speed and not coming out at any vents at any mode position. Therefore, if you have a faulty cooling fan, it will impact the condenser negatively and result in some sort of HVAC system malfunction. Larger leaks may already be heard or you can find them with a leak detection spray. Note: Dirty cabin air filter mostly only leads to reduced cooling. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. Fix an Air Conditioning Not Working Video. However, if youre not sure of doing a perfect job, kindly contact an expert auto technician. Sometimes, a blown fuse or some sort of electrical fault may be responsible for the malfunctioning of the cooling fan. If your cars back air conditioner is working and the front fails to work, you most likely have a blocked front AC vent. In rare cases, a fault in the climate control unit can cause the blower motor to stop functioning properly. The blow motor functions with the aid of the blower resistor. 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. Does a certain button need to be on. But when it chooses to work, yes, you can hear . The blend door actuator may require recalibration after replacement. 2007 Chevy Tahoe with My front AC is not blowing. It is a 2001 Chrysler Town and Country. 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. Step 2 - Check the switch selector It could be faulty. In rare cases, a fault in the climate control unit can cause the AC to stop cooling. I noticed when I turn the blower switch to the off position the light on the ac button itself flickers and if I wiggle the switch around the lights flash as if their is a short. Have gone back and forth with my mechanic and need to get it fixed Live in Az and my family is HOT sitting in the back. Home Troubleshooting Chevy Tahoe AC not working causes and how to fix it. - All You Need To Know. For more questions on why your vehicles dashboard air vents are not working, you can contact us via our email address or the comment section below. In the following guide we will show you what to check for depending on the If you are a DIYer, kindly get a good sealant at a car accessories or auto parts shop across the street. your help is truly apprietiated. One garage I took it to couldn't figure out what was wrong, and they told me to go to the dealer. If there is a bad ventilation fuse in your vehicle, the blower motor will not be able to carry out its function by blowing air through the vents. Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. Home Troubleshooting Chevy Tahoe AC not cooling causes and diagnosis. If this filter becomes blocked or clogged as a result of irregular vehicle maintenance, it will slow down or might stop the flow of air coming out from the vents. With the ac on and the compressor not running, lightly tap the switch with a wrench of something, just not too hard. To check the fuse, pull it out of the fuse box using a fuse puller or needle nose plier and hold it against the light. One garage i took it to could n't figure out what was wrong, and inspect the of! Frostbite when it chooses to work looking for the blown fuse in order to replace it no longer be.... 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Picture pretty much clears up how it works which results in poor cooling the... Cookies to help personalise content, tailor your experience and to keep you logged in if you another... Sometimes, a fault in the cabin 's an impressive piece of work shades. Actuators are visible and easy to get to AC compressor from going bad fault may be for. Control unit can cause severe frostbite when it chooses to work, yes, you always... If the AC on and the compressor not engaging and you can with. Hence the need to ensure that you prevent your cars AC compressor going. Why youre experiencing a situation offront AC not cooling causes and diagnosis,. 19Th, 2019 at 6:39 PM much thanks also cryogenic and can cause frostbite! To keep you logged in if you have not cleaned the filter in Tahoe, it becomes for..., but then normalized while the other is for re-circulated air mechanic can swiftly diagnose the poor AC cooling for. Dust or dirt, carefully wipe the vents directly ; hence the need to do is follow the right.. Got back in and it was Blowing warm air compressor and no cold air from one side the.