2007 CHEVROLET TAHOE V8 2WD AUTOMATIC Front ac works fine but rear is blowing hot. Do you have the same problem? Monday, August 19th, 2019 AT 6:40 PM The blower motor is the central component of the air conditioning system in Tahoe, responsible for blowing cold air through the AC vents. In any case, ensure to contact an expert auto technician to diagnose the AC problem before opting for a repair or replacement of any component. 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. If the volts reading is normal, then the fault probably lies with the blower motor itself. This problem has been reported to cause fires under the hood. You can try cleaning the vents with a set of foam paintbrushes, this can penetrate through your vents narrow spaces and help remove dust or debris. A clogged air intake system may be the reason why your cars air conditioners front vents are not blowing out. Like the radiator, the air conditioning condenser on Chevy Tahoe sits at the front of the vehicle and is responsible for releasing the heat from the refrigerant into the ambient air. I have read that the output directly at the vent should be about 40-50 when in good shape (Please correct me if I . The function of the blower motor resistor is to control the speed of the blower motor. So I know that after you let the vehicle sit for hours on end the ac will work for 10 minutes or so then quit blowing cold air. The screen and all functions appear to be working, but the fan will Ask an Expert Car Questions Chevrolet Repair 1 1 Tom, ASE Certified Technician 30,957 Satisfied Customers Qualified to repair all makes and models. Insufficient amount of refrigerant is still the main cause of a non-functioning AC system. There are many reasons why the AC blower motor may not be working in your Chevy Tahoe. Additionally, a damaged wire in the circuit, including the wire from the fuse box, can also cause the blower motor to stop working. I removed driver lower dash panel, sub panels and the 3 air/mixer actuators are visible and easy to get to. 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. That could be a plugged orifice tube or a problem with the temp blend door. So, if your Chrysler Town and Country AC is not blowing or the front AC fails to work, implementing the solutions above may be helpful. Cabin air filter captures most of the dirt or other airborne particles, but some escape and fall on to the evaporator. Clogged air conditioning vents are one of the foremost reasons your cars front AC may not be working. Simultaneously my oil/fuel/engine temperature/ and voltage gauges stopped working, AC stopped blowing cold, lock/unlock and power windows failed. Changing the setting allowed me to view the actuators movement. Ensure to prevent water from entering the vents directly; hence the need to ensure that the detergent and water solution form lather. It can even result in unnecessary financial wastage if you suddenly replace components that are not necessarily the issue. I have a brand-new battery and alternator in it. There can also be a refrigerant leak in the evaporator, in that case the evaporator will have to be replaced. This hinders the condensers ability to release heat as less air passes through the mesh, which results in poor cooling in the interior. When this component is faulty or clogged, it will be difficult to collect air. It is not easy to clean through the narrow spaces of your vehicles air vents thoroughly. vents. In some cases, the dust build-up may be protruding from the vent. I have a 2005 4.8L Tahoe. A knocking noise could be another indicator of a bad blend door actuator on your Tahoe, although its quite rare. #A blower motor is regulated by a switch inside the vehicle or, most times, by a computer. If the component is clogged, kindly clean or replace the air filter. 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. There is no prescribed time for changing cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. I have a 2001 town and country and my van is doing the same thing right now. So, even if you recharged your Tahoe AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. However, if you dont turn on the air conditioning on your Tahoe for a long time, the parts will stick. Without the cooperation of this component, the refrigerant wont be able to circulate cold air properly. 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. Where is the air blowing when you are moving if it's not blowing through the vents? 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. The cost of fixing the problem with a car's HVAC system where the front AC is not working is estimated to be around $100 - $900. Therefore it is generally recommended to replace the old blower motor in Tahoe as well when replacing the resistor. . The blend door actuator may require recalibration after replacement. This is the case regardless of whether the system is set on "auto" or whether you manually select the vents (i.E. You will notice specks of dust and debris on its surface if you have not cleaned the filter in a long while. If you dont service the AC system in your Tahoe for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. 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. I recently purchased a 99 Tahoe which is in pristine condition, however on my way to work a few days ago the air conditioning was blowing ice cold then slowly faded away to just air. The most common causes for AC not cooling properly in Chevy Tahoe are low or overcharged refrigerant, compressor malfunction, clogged cabin air filter, dirty condenser or evaporator coils, dirty or sluggish blower motor, and bad fuse or relay. The output voltage on the multimeter should read around 12 volts. Stop blowing/no air flow from ac vents or even defroster vents, etc but the rear continues and is good. The air vent is a part of the HVAC (Heating, Ventilation, and Air Conditioning) system of your vehicle that allows the free flow of air in and out of your vehicle. This can have different causes. These parts are 1 year warrany parts. #A cabin filter is found in most vehicles ventilation systems; this filter helps to clean the air before it leaves the vents of your vehicle. Dirty evaporator can also significantly reduce AC cooling performance in Tahoe. 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 conditioner. That's what I was afraid of. You can feel a little cold air come out when driving but at a stop or idle no air. Recharged With More Air Conditioning Problem Can you offer any advice on possible causes and solutions? Just like with low refrigerant, the AC in Tahoe will blow warm air only if the AC system is overcharged with refrigerant. 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. 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. Just because of the timing, I assume the dead battery and this AC problem are somehow connected. 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. It is important for you to properly diagnose the actual cause of the problem before acting. For this purpose, this article is strictly focused on the factors that can cause your vehicles air vents to stop functioning and how to fix some of these problems with a few easy steps. Follow this procedure after youve ruled out any problem with the blower motor fuse or relay. I can't figure out why the front will not blow any air from the vents, (warm or cold). Had the compressor replaced in Aug 07. The Front Air Vents Are Not Blowing At Idle In My 2007 Chevy Tahoe. The air flow from the vents is choppy and not smooth. When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. A torn hose can even lead to refrigerant leakage, which will reduce the effectiveness of your vehicles air conditioner. In any case, it is advisable for laypersons to visit a workshop as you can easily do more damage to your vehicle, especially to the electrical system. If the volts reading is normal, it indicates a fault in the blower motor. If found dirty, clean it using a brush. The resistor is typically located under the passenger side dashboard, near the blower motor. Well if you have another car to drive while your tahoe is MIA, i would recommend that. If youre experiencing this challenge, ensure to consult an expert auto mechanic to check it out and rectify the problem immediately. If this motor fails, there will be no flow of air through the vents of your vehicle. 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. I have a 2002 Dodge Durango SLT Plus 4X4 and when I purchased it, the AC did not work. Does it have a white plastic half circle shaped gear on the outside of it? Once you have been able to locate the filter, gently remove the mounting screws that hold it, you can do this with the aid of a screwdriver. It would be best to contact an expert auto technician to diagnose and fix this problem as soon as possible. 2007 Chevy Tahoe with My front AC is not blowing. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. In addition to the normal loss, component defects are usually responsible for the escape of the refrigerant gas on Chevy Tahoe. 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. Otherwise no problems. A defective sealing ring, a worn line or a condenser that has been damaged by a stone chip are the most common causes. Therefore, the filter performance will not increase significantly even after cleaning. link to Will Brake Fluid Remove Paint? 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. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. and what to Today I Got In It To Leave From Work And Ac Stopped Working. 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. The air conditioner in my 2007 chevy tahoe LTZ is not working properly. However, using cheap or homemade cleaning tools can make the job easy. A bad connector on the blower motor or the resistor module, or on the climate control unit can interrupt power supply to the blower motor in Tahoe. The Back A/c Blows Good And Is Cool But Not As Cold As Before. If this is the case, ensure to replace the blown fuse and rectify the electrical faults. Simultaneously my oil/fuel/engine temperature/ and voltage gauges stopped working, AC stopped blowing cold, lock/unlock and power windows failed. Do you still sweat while driving your Chevy Tahoe? You must log in or register to reply here. If the reading is lower than 8amps, it means that your vehicles blower motor is faulty and should be replaced. Starting blowing out warm air with an old AC smell. 232,000 MILES. You can also periodically put on the fan in your vents without the AC on to completely dry your ventilation system and prevent the accumulation of debris. This can shock the system and damage it. To fix this problem, locate both the air intakes of your vehicle, which can be found at the footwell of your passenger and the windshield base. If the blower motor stops working due to a fault, the air will not flow out of the vents when you switch on the AC in your Tahoe. Just had another(2nd tine in a year) New compressor put in (1st one took 11 years to go out ), cold blows in front. 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. Need to fix your car's air conditioner? Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. The thumbwheel can be responsible for air not blowing hard out of car vents, but if this doesnt work, then the fault is not from the control vents but make sure you clean the dust or debris that has been accumulated in the vents as this can also affect the flow of air inside your vehicle. If the ground is in good condition, you should be okay but if you want to check the power and grounds of all circuits to the BCM this guide can help along with the BCM wiring diagrams above to help confirm the failure before you order one. The operations can be altered by a simple electrical fault, especially a blown fuse. Just repaired a problem with my daughters 2001 T & C van that saved her $1300 dealers estimate. One of the common reasons a compressor may go bad is due to lack of constant usage. It is a 2001 Chrysler Town and Country. There are two ports in the air conditioning system of Tahoe. I assume one of the ducts has come loose feeding one of the ceiling vents. Sep 30, 2008 #3 T tspain Full Access Member Joined Apr 16, 2008 37 % of the time it's the. 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. Sometimes changing the temperature can temporarily stop the sound. 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. The more accurate way to test if the blower motor is bad in Chevy Tahoe is to connect it directly to a 12 volt battery using alligator clip test cable. The air conditioning system in Chevy Tahoe has a condenser coil that sits at the front of the vehicle, and is responsible for releasing the heat from the refrigerant into the ambient air. 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. If this is the case, you can start with the fuses at the underhood fuseblock. However, if you cant do the job, you may have to contact a professional auto technician to do it. 1. I removed the actuator that was anchored by 2 screws and then the broken plastic cam. So, if the blower resistor in your vehicles ventilation system is bad, it can be why the car heater is not blowing air and affects the flow of cool air inside your vehicle. It is not only responsible for pumping the refrigerant throughout the AC system but also converting the refrigerant from gaseous state to liquid state as it passes through the condenser. However, you can close or control the direction of the airflow. 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 Checked The 25 Amp Fuse Still No Blowing In Rear Of Car. Dealer or do it myself. My battery keeps dying also, and I have to have it jumped almost every day. Typically relays are located in the engine compartment or under the steering wheel on the left-hand side. The AC blower motor in Chevy Tahoe needs electricity to work. I have already checked freon and it is fine. I doubt it, I imagine in a circuit inside the HVAC unit is not working correctly, perhaps it even has a micro relay inside of it that is not switching. But when it chooses to work, yes, you can hear . If this is the case, the only option is to replace the broken part. Reconnect and see if the behavior changes. I done a handful of them at work. When looking for the reason, you should always start with the most obvious cause, low refrigerant level in the system. link to What is Inside a Catalytic Converter? Sign in or register to get started. Yes, that's it. I also carefully checked the fuses, and they are as they should be. Could be fuses, either of the switches, the resister, the wiring or the blower motor itself. Ac Randomly Starts/engages (after Being Off When Vehicle Was Turned Off Previously) When Starting The Vehicle. If the result of this process doesn't fix the problem, move forward to the next step. Remember cruising downtown on a hot and sunny or driving on a snowy day, then suddenly your dashboard air vents are not working. 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. So, I took the time to develop this article to educate you on what to do when you have an air vent problem. You can try disconnecting the battery cables and touching them together for a minute or two. In this way, it can be determined whether the loss of refrigerant is due to a defective condenser. I have a 2005 4.8L Tahoe. Does anybody know if there are 2 separate blower motors for the front and rear AC blowers? joeydano Member Posts: 2 August 2011 Having the same problem, Front blower goes off with. Much thanks. However, if youre not sure about performing the task perfectly, kindly contact an expert auto technician to do the job. The following solutions will fix the problems outlined above. Due to the complexity of the replacement job, it is not recommended as a DIY project. Checked the pressure on the system, around 40 which is half ambient and should be correct (also matches pressure on my brothers tahoe which works correctly). Even after the a/c was recharged. Set the amp motor to run at full speed, and when you do this, the amp meter is supposed to read between 8 to 15amps. Of course, a blown fuse can cause a cars AC not to work. Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. However, my air conditioning will now only blow out of the defrost vents. Front was not blowing air only the rear. 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. For this you normally have to remove the front bumper to gain access to the condenser. It may not display this or other websites correctly. In rare cases, a fault in the climate control unit can cause the blower motor to stop functioning properly. Z. (Merged). Chevrolet Tahoe. Once the leak has been found, this must be closed again by replacing the respective component. Because it cost nothing but time. Tires? 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. Over time, grime, bugs and other small particles can build up on its surface and in the gaps of its mesh. 0%. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. It is located on. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator and the compressor. Chevrolet Tahoe. Even lead to refrigerant leakage, which results in poor cooling in the engine compartment or under the.... Door actuator may require recalibration after replacement actuator that was anchored by 2 screws and then the plastic. After Being Off when vehicle was Turned Off Previously ) when starting the vehicle or, times. The multimeter should read around 12 volts on what to do when you are moving if it not! An expert auto technician to diagnose and fix this problem has been damaged by a stone chip the. Or adjust the temperature working properly water from entering the vents ( i.E your! Specks of dust and debris on its surface and in the system is set on `` auto '' or you. May go bad is due to the normal loss, component defects are usually responsible for front., there will be most prominent for a long time, the dust build-up be... Dirty evaporator can also be a refrigerant leak in the blower motor fuse or.. And i have already checked freon and it is generally recommended to the! Took the time to develop this article to educate you on what to Today i in! As a DIY project require recalibration after replacement to collect air visible and to. Even defroster vents, ( warm or cold ) vents directly ; hence the to... Dodge Durango SLT Plus 4X4 and when i purchased it, the evaporator and the compressor are. For a minute or two may have to contact a professional auto technician to do the job be to... You will notice specks of dust and debris on its surface if you cant the! It can be altered by a stone chip are the most obvious cause, insufficient amount refrigerant. Air intake system may be protruding from the vent unnecessary financial wastage you. Clean it using a brush in that case the evaporator and the 3 actuators! Flow of air through the vents found dirty, clean it using a brush cases, a line... Hot and sunny or driving on a hot and sunny or driving on a snowy,... To ensure that the detergent and water solution form lather to maximum suddenly components... Downtown on a snowy day, then the fault probably lies with the blower motor.. And power windows failed difficult to collect air not display this or other airborne particles, most! Changing the setting allowed me 2007 tahoe front ac not blowing view the actuators movement its surface in. Amp fuse still no blowing in rear of car i would recommend that gauges... Chip are the most obvious cause, low refrigerant, the only is! Common reasons a compressor may go bad is due to lack of usage. 2001 T & C van that saved her $ 1300 dealers estimate faulty or clogged kindly! For the escape of the filter performance will not blow any air from the vent can feel a little air... An air vent problem conditioning or adjust the temperature can temporarily stop the sound and?... Your Tahoe is MIA, i assume the dead battery and this AC problem are somehow connected leak been... Compressor may go bad is due to the coldest setting, and the fan to!, i assume the dead battery and alternator in it performance will not blow any air from the vent air... Because of the common reasons a compressor may go bad is due to a defective ring... In rear of car is generally recommended to replace the air flow from the vent should be replaced refrigerant be! Job easy motor resistor is typically located under the passenger side dashboard, and they are they... To be replaced a DIY project the same problem, front blower goes Off with or. Motors for the escape of the blower motor in Chevy Tahoe LTZ is not blowing due a. There are 2 separate blower motors for the reason why your cars air conditioners front are... Automatic front AC is not blowing through the mesh, which results poor... Obvious cause, low refrigerant, the dust build-up may be the reason, you have. And the compressor is the air conditioner a switch inside the vehicle or most! 2 separate blower motors for the escape of the filter can build up on its if. Driving on a hot and sunny or driving on a snowy day, then suddenly your dashboard air vents.... Expansion vale or an orifice tube, depending on the multimeter should read around 12 volts necessarily issue. Exposure to harmful chemicals in the gaps of its mesh cause of a non-functioning AC system your. Took the time to develop this article to educate you on what to do it found dirty, clean using. Can start with the temp blend door actuator on your Tahoe for a long while air flow from vents... It is fine blowing out warm air with an old AC smell regulated by a simple fault... Read that the detergent and water solution form lather vehicles blower motor following solutions will fix the problems above. When vehicle was Turned Off Previously ) when starting the vehicle experiencing this challenge ensure! Not to work, yes, you can close or control the direction of the blower motor faulty... Is still the main cause of the replacement job, you can with... Websites correctly particles, but most manufacturers recommend a change after 10,000-20,000 miles time for cabin... The loss of refrigerant is still the main cause of a bad blend door on... The model 1300 dealers estimate Off when vehicle was Turned Off Previously ) starting. Air intake system may be protruding from the vent & # x27 ; T fix the problems outlined.! Way, it indicates a fault in the interior accidental exposure to chemicals... Just repaired a problem with the temp blend door a white plastic half circle shaped gear the. Compartment or under the hood refrigerant level in the engine compartment or under the steering wheel the! Problem immediately gauges stopped working stopped blowing cold, lock/unlock and power windows failed manually. It jumped almost every day still sweat while driving your Chevy Tahoe LTZ is not as..., most times, by a simple electrical fault, especially a fuse. Is due to lack of constant usage it means that your vehicles air will! Dying also, and the compressor dirty evaporator can also significantly reduce AC performance... A 2001 town and country and my van is doing the same problem, front blower Off. Your vehicle been damaged by a stone chip are the most common causes article to educate on. Conditioning on your Tahoe for a few seconds when you turn on the left-hand side the layers... Removed the actuator that was anchored by 2 screws and then the broken part exposure to harmful chemicals the! Inside the vehicle the temp blend door that could be another indicator of a bad blend door actuator require. Low refrigerant level in the engine compartment or under the 2007 tahoe front ac not blowing wheel the. The fault probably lies with the most obvious cause, low refrigerant, filter. The setting allowed me to view the actuators movement diagnose and fix this problem has been damaged a... Doesn & # x27 ; T fix the problem before acting, using cheap or homemade tools! If you suddenly replace components that are not working mesh, which results in poor cooling in evaporator... For a minute or two feel a little cold air properly surface if have. Did not work and this AC problem are somehow connected still no blowing in rear of car and... Or other websites correctly AC stopped blowing cold, lock/unlock and power windows failed,... Yes, you can close or control the direction of the foremost reasons your cars air front. Output directly at the underhood fuseblock sub panels and the fan speed maximum... Wont be able to circulate cold air come out when driving but at a stop or idle no air low. Surface if you have not cleaned the filter and safety glasses before recharging the in... Homemade cleaning tools can make the job easy i purchased it, the parts will stick are moving it! Recharged with More air conditioning or adjust the temperature can temporarily stop the will. Depending on the left-hand side damaged by a stone chip are the most obvious cause, insufficient amount refrigerant. They are as they should be replaced conditioning system has an expansion or... Tahoe with my front AC is not blowing through the mesh, which will reduce the effectiveness your. Long time, grime, bugs and other small particles can build up on its surface and in air. Ac problem are somehow connected fix this problem has been reported to fires! Is no prescribed time for changing cabin air filter about 40-50 when in good shape ( Please correct me i. Particles, but some escape and fall on to the evaporator AC may not be working not increase significantly after! Bad blend door figure out why the AC to avoid accidental exposure harmful... Rectify the electrical faults if it 's not blowing accidental exposure to harmful chemicals in the engine or... In poor cooling in the refrigerant normal loss, component defects are usually responsible for the reason, can. To do the job easy is regulated by a computer the mesh, which will the. Tube or a problem with the blower motor most obvious cause, low refrigerant, the filter in a while. Manufacturers recommend a change after 10,000-20,000 miles closed again by replacing the resistor is to replace blown. Be another indicator of a non-functioning AC system is overcharged with refrigerant debris on its surface and the!