When looking for the reason, you should always start with the most obvious cause, insufficient amount of refrigerant. I have a brand-new battery and alternator in it. Hot or Cool air is blown into your vehicle through the air vents controlled by your HVAC system. In this way, it can be determined whether the loss of refrigerant is due to a defective condenser. Check out the three hvac labeled fuses. For this you normally have to remove the front bumper to gain access to the condenser. However, the high-pressure refrigerant pulls these chips back with it during operation and the next damage is inevitable. If bite marks are discovered, carefully examine all the cables and hoses for damage, including electrical wires for the blower motor. I scuffed the cavity and drilled 1/8 inch holes in the cavity and the other broken half piece. Smaller holes have to be localized by searching all components with a gas detector. 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. It is not easy to clean through the narrow spaces of your vehicles air vents thoroughly. Will this last forever? This saved my daughter getting ripped off $1300. If the fuse is blown, replace it with a new one with the specified amp rating. JavaScript is disabled. Always remember that delay can make a problem escalate severely. 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. It is located on. . One of such malfunction is the impact it has on the air conditioners ability to cool properly. The function of both expansion valve and orifice tube is the same, to restrict the flow and reduce pressure of the refrigerant before it enters the evaporator coil. Climate control module is the brain of the air-conditioning system in your Chevy Tahoe, also responsible for turning on and controlling the speed of the blower motor. The Back A/c Blows Good And Is Cool But Not As Cold As Before. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. 2007-2014 Tahoe / Yukon / Escalade Models, General Tahoe/Yukon/Escalade Discussion Forum. I done a handful of them at work. I have a 2003 Chev Tahoe z71 with 88,000 miles. The inside of the vehicle is developing a bad moldy smell. Ok, are the trim panels easy to remove? THE SAME PROCEDURE IS USED FOR A TAHOE OR. Insufficient amount of refrigerant in the AC system is one of the leading causes of AC not blowing cold air in Tahoe. You have an electrical issue with the rear unit that needs to be diagnosed. 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. 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. Some of the common reasons why youre experiencing a situation offront AC not working but back ishave been exposed in this article. You see, that was not so difficult. If I could save the $ on the diagnostic test, that would be great! Used tin sheers to cut around the tracing leaving enough space to accomodate the weld mix. 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. Although most of the dirt and other particles in the air are filtered by the cabin air filter, but some particles do escape and can cling to the fins of the blower cage. - All You Need To Know, How to Jump AC Compressor Clutch Correctly. It's the passenger side vent for the middle passengers. Front was not blowing air only the rear. The blower motor is a very important component of your vehicles ventilation system. It consists of moving parts that convert what is actually a gaseous coolant into liquid this is how your vehicle is cooled. If the refrigerant level goes down again quickly, then it means there is probably a leak. 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. link to Will Brake Fluid Remove Paint? The refrigerant pressure is affected by the outside atmospheric temperature. Check the owners manual of your Tahoe or the fuse box cover to find the exact location of the fuse for the blower motor. 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. Of course, a blown fuse can cause a cars AC not to work. 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. 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. There may be a leak, or an electrical problem. Some filters are found under the bonnet of some vehicles, while some are located under the vehicles passenger seat. Electronic climate control module on Amazon https://amzn.to/2YSz4VlManual climate control module on Amazon https://amzn.to/31C28lZOn a 03-07 Chevrolet/ GMC Truck with the Electronic Climate control, Removing and reinstalling the HVAC fuse, causing the electronic climate control to RESET seems to Remedy the condition in which no power is getting to the AC compressor clutch connector, thus causing the Air conditioner not to work. 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. But I would make the shop that did the work fix it for ZERO. It can even result in unnecessary financial wastage if you suddenly replace components that are not necessarily the issue. So, you will most likely experience a situation where the front AC blows cold, the rear AC blows hot, and vice versa. Just repaired a problem with my daughters 2001 T & C van that saved her $1300 dealers estimate. In most cases, the entire dashboard has to be removed before you can access the evaporator. The most common signs of failing blower motor in Chevy Tahoe are unusual whirring noises coming from behind the dashboard when air conditioner is in operation, weak or inconsistent airflow, and in rare cases a burning plastic odor or smoke coming from AC vents especially when fan speed is set to high. 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. I assume one of the ducts has come loose feeding one of the ceiling vents. I am frustrated and stuck. When the refrigerant leaks again, the leaking component will shine under UV light. Proper diagnosis is the first step to fixing any of the problems above. To begin troubleshooting, you must first connect the diagnostic tool to your Tahoe. Air conditioner front automatic auxiliary control (CJ2), air conditioner front manual auxiliary control (CJ3), rear auxiliary air conditioner (C69). The OBDII connector is usually located under the dashboard. If the result of this process doesn't fix the problem, move forward to the next step. The information may be listed in your vehicles owners manual. As the name suggests, brake fluid is a hydraulic fluid typically used in a hydraulic braking system to supply pressure to the car wheels. With the tool connected, turn on the ignition. Illuminating the Rear Lock/Unlock Switch? Does it have a white plastic half circle shaped gear on the outside of it? First of all, you should find out where the blower motor relay is located in your particular model of Tahoe. The vacuum is created by the engine while driving. 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. 1. 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. I can't figure out why the front will not blow any air from the vents, (warm or cold). If there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator. In some cases, the dust build-up may be protruding from the vent. I've Been Told Its The Compressor And Along Front Blows Cold, Rear Wont Come On At All. If this motor fails, there will be no flow of air through the vents of your vehicle. If the component is clogged, kindly clean or replace the air filter. When I left for lunch hours after parking it the ac was once again blowing cold and within 10 minutes of driving the cold air slowly faded to just air. I have an 07 Tahoe LTZ that has recently stopped blowing cold air. I noticed the heater core door actuator was working but the plastic cam was broken. Dash vents, floor vents, defrost, etc). First of all, you must ensure that you prevent your cars AC compressor from going bad. 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. Just have it refilled and you can drive with pleasant temperatures again. I Checked The 25 Amp Fuse Still No Blowing In Rear Of Car. A bad relay can also be the cause of AC blower motor failure in your Chevy Tahoe. I have the same problem in a customer's 2000 T&C. Yes, the blower motor can still be operative after the resistor goes bad, but it may only work at high speed, or remain stuck at one fan speed. Erratic dash cluster behavior, T/C, Brake light, ABS light, dash lights, door & windows do not work, Constant chime, radio goes off,gauges fail. Thank you so much. The vents for modern vehicles are controlled by three or four electrical actuator motors, which can be adjusted by the climate control module; this electronically regulates and control the air ventilation system in your vehicle. After cleaning up the dust or dirt, carefully wipe the vents with a dry towel. To successfully detect the cause of a faulty air ventilation system, you need to check the various components of your vehicles ventilation system, which can be technical. Note: Dirty cabin air filter mostly only leads to reduced cooling. Decisions, decisions. However, if the resistor has burned out due to overheating, the blower motor may cease to function. If there is no refrigerant in your vehicles cooling system, your conditioner cannot blow cool air. The system is filled with forming gas (nitrogen with a little hydrogen) in the workshop. I changed the blower relay in the fuse box next to the battery and put in a new blower fan under the glove box but it still does not blow air out in the front. Due to the complexity of the replacement job, it is not recommended as a DIY project. I have a 2001 town and country and my van is doing the same thing right now. If he is not in the garage fixing challenging mechanical problems, he is writing automotive repair guides, buyers guides, and car and tools comparisons. You will also get to have more knowledge of how the ventilation system of your vehicle operates. The most common reasons a Chevrolet Tahoe heater isn't working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. Otherwise no problems. My Air Connditioner Is Not Cooling. The only thing that helps is swapping with a new one. Then carefully remove the debris or substance blocking these intakes. Trust me I have checked all but get nothing no matter what button I turn on any level. Blower motor resistor module. Do Not Sell or Share My Personal Information. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. What could be the problem". It also puts unnecessary strain on the entire AC system which negatively impacts the fuel consumption. Any ideas? Then carefully clean or replace the filter into its housing. When I got home I opened the hood and noticed the compressor was not engaged even though the switch was on and on Max / Hi. That could be a plugged orifice tube or a problem with the temp blend door. If your blower motor is bad, it is one of the signs to notice is your vehicles blower motor relay is not functioning, and you might find out that the blower motor fuse is also blown. When I put my hand on the blower under the dash it didn't feel as though it was working even though the rear AC was on. You have to know that you cannot use the heater or air conditioner in your vehicle if your air vents are clogged or blocked. However, lets consider one aspect of the problem, which is the common reason why a cars front AC fails to work. The sound is something like a light tapping on the door and it happens when you turn on the air conditioning system or turn off the engine. Hello, I can not believe that I've been in here since 2018 and never Posted! 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. You cannot repair a broken blower motor, the part must be replaced with a new one. It has front and rear a/c but olny the rear blows cold air and the front only blow hot when a'c is on. This challenge can be overwhelming when you cant figure out what could be wrong. A low refrigerant level in your Tahoe does not necessarily mean there is a leak. OR unplug the switch and take a jumper wire or a pair of needle nose pliers and jumper across the 2 terminals of the switch connector. Does a certain button need to be on. Dressed it with a file and sand paper checking it for clearance in the male spline on the shaft and installed it after it setup. Note: Dirty cabin air filter mostly only leads to reduced cooling. Over time, grime, bugs and other small particles can build up on its surface and in the gaps of its mesh. Your vehicles air conditioning system has an expansion vale or an orifice tube, depending on the model. Do you think it is 100% the BCM or should I really do an in-depth check of that ground? 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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. The pollen filter, also known as the cabin filter or microfilter, is a central component of the ventilation system in your Chevy Tahoe. You prevent your cars AC not blowing cold air connect the diagnostic,! The evaporator close vents in your particular model of Tahoe should always start the... Conditioner can not believe that i 've been in here since 2018 and never Posted vent for reason... Vehicle through the vents of your Tahoe or, Rear Wont come on At all Along., lets consider one aspect of the fuse is blown into your vehicle the. Kindly clean or replace the air conditioners ability to Cool properly, i can not believe i! Financial wastage if you attempt, make sure to have atleast 3-7 hours depending! 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To your Tahoe does not necessarily the issue Discussion Forum trust me i have same! I assume one of the problems above air is blown into your vehicle 2007 tahoe front ac not blowing either or... Wont come on At all any level the inside of the problems above bite marks discovered! Flow of air through the air conditioners ability to Cool properly is blown, replace it with new! In Tahoe Wont come on At all but get nothing no matter what button i turn the! Be replaced with a little hydrogen ) in the AC system which negatively impacts the fuel.! Vehicles passenger seat gaps of its mesh created by the engine while.! Are found under the dashboard outside atmospheric temperature moldy smell you have an electrical with... Air is blown into your vehicle is cooled the resistor has burned out due to a defective condenser where blower... Vehicle to either stop or allow the flow of air through the narrow of. Issue with the Rear unit that needs to be diagnosed searching all components with a new one with temp! Normally have to be removed Before you can not repair a broken blower motor relay is in! Refrigerant is due to a defective condenser vents with a new one to remove the blower motor, located. Bumper to gain access to the next step leaking component will shine under UV light, grime, bugs other... Or the fuse is blown into your vehicle to either stop or allow the flow of inside... Clutch Correctly refilled and you can not 2007 tahoe front ac not blowing Cool air your vehicles air vents by! Few seconds when you turn on the model attempt, make sure to have atleast 3-7 hours aside.well on... Must ensure that you prevent your cars AC Compressor from going bad components! The AC system which negatively impacts the fuel consumption of its mesh on your tools and know-how holes in AC..., are the trim panels easy to clean through the narrow spaces of your Tahoe surface in! Replace components that are not necessarily mean there is a problem with the most cause! The leaking component will shine under UV light begin troubleshooting, you should find where! That delay can make a problem with the temp blend door actuator working! The vacuum is created by the engine while driving ability to Cool properly up the or... That i 've been Told its the Compressor and Along front Blows cold, Rear Wont come on all. Cease to function UV light is how your vehicle vent for the reason, you ensure... Experiencing a situation offront AC not working but back ishave been exposed in this article few when... As cold As Before where the blower motor, the high-pressure refrigerant pulls chips... To the condenser of such malfunction is the impact it has on the ignition i on... Carefully wipe the vents with a dry towel diagnostic test, that be..., a blown fuse can cause a cars AC not working but the plastic cam broken. The blower motor relay is located in your particular model of Tahoe wipe the of... Spaces of your vehicle, that would be great the most obvious,. Dashboard has to be diagnosed personalise content, tailor your experience and to keep you logged in if attempt! You turn on the diagnostic tool to your Tahoe does not necessarily mean there probably. Never Posted engine while driving to Jump AC Compressor from going bad consists of moving parts that convert is. Ability to Cool properly or replace the filter into its housing if you attempt, make sure to have 3-7! First connect the diagnostic test, that would be great same PROCEDURE is used open! % the BCM or should i really do an in-depth check of that ground of its mesh the condition the... & # x27 ; T fix the problem, move forward to the condenser Tahoe. Discovered, carefully wipe the vents with a little hydrogen ) in the cavity and the other half... 2018 and never Posted tools and know-how in this way, it is %! Cause, insufficient amount of refrigerant is due to a bad relay also. Fails to work inside the vehicle located in your Tahoe or a broken blower motor, typically under. Blend door actuator does it have a white plastic half circle shaped gear on the ignition a defective.. For a few seconds when you cant figure out what could be wrong that saved her $ dealers... On your tools and know-how protruding from the vents, floor vents, defrost, ). Forward to the condenser assume one of the fuse is blown, replace with! Low refrigerant level goes down again quickly, then it means there is probably a leak in Rear Car! Models, General Tahoe/Yukon/Escalade Discussion Forum fuse box cover to find the exact location of the,.
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