The air flow from the vents is choppy and not smooth. 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. 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Remove the cap from the low pressure service port labelled L, and connect the AC recharge kit. No air, no sounds NOTHING. In this way, it can be determined whether the loss of refrigerant is due to a defective condenser. I replaced the blower resistor (about $30.00 from Chevrolet Parts). Ensure to prevent water from entering the vents directly; hence the need to ensure that the detergent and water solution form lather. Front ac works fine but rear is blowing hot. 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. However, if you have a situation offront AC not working but back is,that must be a tricky challenge demanding critical analysis. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely. Step 2 - Check the switch selector It could be faulty. 2007 CHEVROLET TAHOE V8 2WD AUTOMATIC Front ac works fine but rear is blowing hot. There may be a leak, or an electrical problem. During winter, the vehicles heater is needed to function optimally due to the very cold environment as opposed to summer. Prior to the battery going dead, I had no problems with the AC. 2007 suburban, the air will not blow out of the regular front vents, only blows out through the defrost vents we think it is the blend door, and have the new part, . When looking for the reason, you should always start with the most obvious cause, low refrigerant level in the system. If the fuse is blown, replace it with a new one with the specified amp rating. The ventilation system of most vehicles can be opened by a manual device known as the Thumbwheel. The thumbwheel is used to open or close vents in your vehicle to either stop or allow the flow of air inside the vehicle. 1. You can recharge your AC through the low-pressure port with a do it yourself AC recharge kit. Ac Randomly Starts/engages (after Being Off When Vehicle Was Turned Off Previously) When Starting The Vehicle. If you drive your vehicle in dusty or polluted environment, the filter can get dirty much sooner than manufacturers recommendation. Welcome to rxmechanic.com. 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. 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. I have a 2007 chevy Tahoe. Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. Since some OBD codes are manufacturer-specific, the scanner will be able to give you more accurate information if you enter more details about your Tahoe. However, you can close or control the direction of the airflow. Reconnect and see if the behavior changes. 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. I disconnected the battery for Air Bag Safety but was not necessary after removing the panels. Chevrolet 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. To begin troubleshooting, you must first connect the diagnostic tool to your Tahoe. 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. If bite marks are discovered, carefully examine all the cables and hoses for damage, including electrical wires for the blower motor. If you are only topping off the refrigerant in your Chevy Tahoe with off-the-shelf refrigerant recharge cans and not repairing the leak, you may have flooded with AC system with oil since these cans often contains added oil. The blower motor is the central component of the air conditioning system in Tahoe, responsible for blowing cold air through the AC vents. Turn on the AC and set it to the coldest setting, and the fan speed to maximum. It is located on. I also tested the compressor switch which was good. You can access the filter by following a few simple steps, as shown in the video. However, my air conditioning will now only blow out of the defrost vents. If the fuse is blown, replace it with a new one with the specified amp rating. After cleaning up the dust or dirt, carefully wipe the vents with a dry towel. That's what I was afraid of. Monday, August 19th, 2019 AT 6:39 PM Most vehicle control doors have control to prevent you from damaging the door; this control is called a thumbwheel. This is the case regardless of whether the system is set on "auto" or whether you manually select the vents (i.E. This door can be used to block or allow the flow of air inside your vehicle. When this happens, it becomes difficult for air to circulate appropriately within the air conditioner system. Even after the a/c was recharged. For this you normally have to remove the front bumper to gain access to the condenser. What could be going on? The fuse is a very sensitive component in the HVAC system. #The air conditioning system consists of air control vents with a control door inside your vehicle on the dashboard. I have a 2001 town and country and my van is doing the same thing right now. Firstly, take out time to inspect your cars AC vents on the dashboard. A clogged air intake system may be the reason why your cars air conditioners front vents are not blowing out. My battery keeps dying also, and I have to have it jumped almost every day. However, due to excessive dust or dirt build-up, the air filter can be clogged over time, resulting in several malfunctions. If the volts reading is normal, then the fault probably lies with the blower motor itself. It does not matter in which direction you insert the fuse. Home Troubleshooting Chevy Tahoe AC blower motor not working causes and diagnosis. Meanwhile, if you know someone who is having this challenge right now, kindly recommend this article to them immediately. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. Meanwhile, the car makes and model can also impact the cost of repair. With the tool connected, turn on the ignition. Are you currently in the car market and getting discouraged by high prices? However, lets consider one aspect of the problem, which is the common reason why a cars front AC fails to work. I assume one of the ducts has come loose feeding one of the ceiling vents. This may be a situation of leaving the system dormant throughout winter only to start using it again in summer. A cars AC fuse is located within the disconnection box that is connected to the air conditioner. Does a certain button need to be on. yes you can apply 12 volts dc power to the male pins on the blower motor after removing the connector and observing polarity of the wires so you know which pin is the ground (negative which is the black wire, positive the red) and which one is the positive. Sometimes, your cars air intake system may be clogged, preventing proper air inflow. Thanks for any help! 2005 CHEVROLET TAHOE. Clogged air conditioning vents are one of the foremost reasons your cars front AC may not be working. 0 answers. Can you offer any advice on possible causes and solutions? As a rule, there is no avoiding a change. Finding these mostly very small leaks is often not easy. Anybody know what this problem is? Both of these are at risk of clogging due to contamination, for example due to metal shavings from a failing compressor. Therefore it is recommended to do this at a workshop. 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 dealer said it was a modulator. You must log in or register to reply here. If your cars back air conditioner is working and the front fails to work, you most likely have a blocked front AC vent. Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. What these are and what you can do about it, we explain in this article. The only thing that helps is swapping with a new one. - All You Need To Know, How to Jump AC Compressor Clutch Correctly. 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