This can shock the system and damage it. Finding these mostly very small leaks is often not easy. 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 scuffed the cavity and drilled 1/8 inch holes in the cavity and the other broken half piece. Another thing that could be the cause is the low pressure switch mounted on the accumulator. I have a 2001 town and country and my van is doing the same thing right now. 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. Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved. All you need to do is follow the right process. You do not have to remove the dash. Immediately you are done with this, you will notice a better performance of your vehicles ventilation system. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Had the compressor replaced in Aug 07. A bad relay can also be the cause of AC blower motor failure in your Chevy Tahoe. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. 2007-2014 Tahoe / Yukon / Escalade Models, General Tahoe/Yukon/Escalade Discussion Forum. You can also use dry brushes for this purpose but remember, you have to do this gently. So, this article is a straightforward guide to help you ascertain the causes of the problem and how to fix them immediately. In any case, it is advisable for laypersons to visit a workshop. Does take a long time, if you attempt, make sure to have atleast 3-7 hours aside.well depending on your tools and know-how. So, even if you recharged your Tahoe AC at the recommended pressure, the system could still over pressurize when the ambient temperatures get warmer. The air conditioner in my 2007 chevy tahoe LTZ is not working properly. In case of a faulty fuse, the circuit is interrupted and the motor can not work. Blower motors are maintenance-free and can easily last for over 10 years, but they can fail earlier due to overheating, moisture damage or manufacturing defect. It is not easy to clean through the narrow spaces of your vehicles air vents thoroughly. Larger leaks may already be heard or you can find them with a leak detection spray. There are many reasons why your Chevy Tahoe AC is not cooling properly. 31 % of the time it's the. I done a handful of them at work. You have an electrical issue with the rear unit that needs to be diagnosed. 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. You are using an out of date browser. link to Will Brake Fluid Remove Paint? A maximum of the metal pipes can be rinsed here. You dont necessarily have to visit a workshop to clean or replace the pollen filter on your Tahoe. Ugh. So, you will most likely experience a situation where the front AC blows cold, the rear AC blows hot, and vice versa. If there is no refrigerant in your vehicles cooling system, your conditioner cannot blow cool air. 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 it is generally recommended to replace the old blower motor in Tahoe as well when replacing the resistor. 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. I have the same problem in a customer's 2000 T&C. What could be the problem". Check your vehicles owners manual or look under the hood to find the type of the refrigerant your vehicle uses. Fix an Air Conditioning Not Working Video. When this happens, it becomes difficult for air to circulate appropriately within the air conditioner system. Rodents, such as rats or mice, can get under the hood or even make their way inside the dashboard of your Tahoe and chew on wire coatings, which can cause all sorts of electrical problems. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. Remember cruising downtown on a hot and sunny or driving on a snowy day, then suddenly your dashboard air vents are not working. 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This is because the air conditioner system is largely electronic. 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. The most common causes for AC fan blower motor not working in Chevy Tahoe are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. What these are and what you can do about it, we explain in this article. Insufficient amount of refrigerant in the AC system is one of the leading causes of AC not blowing cold air in Tahoe. The air conditioning is a blessing, especially in hot temperatures. Then carefully remove the debris or substance blocking these intakes. Otherwise no problems. Replaced everything and was good to go. Once or twice I have noticed smoke blowing out of the vent for a few seconds. Ok, are the trim panels easy to remove? Some of the common reasons why youre experiencing a situation offront AC not working but back ishave been exposed in this article. 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. Ac Randomly Starts/engages (after Being Off When Vehicle Was Turned Off Previously) When Starting The Vehicle. 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. 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 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. No air, no sounds NOTHING. The Front Air Vents Are Not Blowing At Idle In My 2007 Chevy Tahoe. Cleaning the evaporator in Tahoe is not a simple task. The inside of the vehicle is developing a bad moldy smell. If there is no current to stir up the blowing motor, there will be no ventilation. This problem can either be caused by a damaged blower motor or resistor, blocked air intake, damaged fuse, or a torn hose. Much thanks. As a rule, there is no avoiding a change. Any ideas? Connect the pressure gauge to the low pressure (L) port in Tahoe. This challenge can be overwhelming when you cant figure out what could be wrong. They replaced the compressor and no cold air still only warm air. The two most prominent symptoms of a clogged up evaporator on your Tahoe are: Cleaning the evaporator on Tahoe is not a simple task. Dirty cabin air filter One of the common reasons a compressor may go bad is due to lack of constant usage. 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. My battery keeps dying also, and I have to have it jumped almost every day. I have a brand-new battery and alternator in it. 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. A knocking noise from behind the dashboard could be an indicator of a bad blend door actuator in your Tahoe. It does not matter in which direction you insert the fuse. Reconnect and see if the behavior changes. While some cars AC problems can consume as much as $1000 $4,000, others may fall within $163 $520. 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. 2007 Chevy Tahoe with My front AC is not blowing. Failed condenser or compressor. When this happens, you may hear unusual whirring or droning noises from behind the dashboard. The most common causes for AC fan blower motor not working in Chevy Tahoe are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. It worked for two weeks - not great but it put out cold air, then a minute or two of warm air w/ the smell again. To clean the cabin filter, you find your vehicles cabin filter under the passengers seat or under the bonnet, depending on your vehicles design. 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. No not a problem. My Air Conditioner cools fine and then it will blow warm air for awhile. 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Dash vents, floor vents, defrost, etc). I am frustrated and stuck. To know if your vehicles motor is faulty, you need to connect an amp meter to the blower motors power wire. Typically relays are located in the engine compartment or under the steering wheel on the left-hand side. 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. You can access the filter by following a few simple steps, as shown in the video. However, you must ensure that you apply the correct solution to the accurate problem to get your desired results. Anybody know what this problem is? The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Some of the signs that let you know that your cars AC vent is clogged include the following; inconsistent temperature circulation, dust build-up within vents, overheating, etc. 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. The OBDII connector is usually located under the dashboard. Yes No Monday, June 27th, 2011 AT 2:24 PM 19 Replies FACTORYJACK EXPERT Aside for checking the system for fault codes, I would suspect a faulty blend door actuator, or faulty expansion device. If your AC system is depleted on refrigerant this will not work Where is the air blowing when you are moving if it's not blowing through the vents? This might lead to a point where the air conditioner starts blowing hot air. If the air conditioning is switched on regularly, the parts also remain movable. 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