Location of the compressor is very low in front of the engine. The A/C system in your Yukon consists of a compressor that is belt-driven, an evaporator and freon. Sometimes it would do this and other times it would not, Shut the AC off for a few minutes and then turn it back on and BAM cold air … Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. What would be the cause of the rear AC. when i turn the control knob to hot the air comes out of the floor outlet and is warm/hot. All the controls are set to cold for the rear and the blower is operating fine. 134 freon is cheap get you a can with the gauge and pump it back up and see how long it last. Both lines at the rear evaporator are warm when I fully load the a/c on max, one is just a bit warmer than the other; unlike the front where the one line is so hot you can't touch it. 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, GMC Envoy: Air Conditioner Not Cold → Diagnosis, GMC Sierra: Air Conditioner Not Cold → Diagnosis, Chevy Impala: Brake Lights Stuck On → Diagnosis. I have a 99 Yukon Denali and my front vents are not blowing cold for some reason. We recommend having a professional recharge your A/C if it does end up being a coolant issue. Whenever my mom turns on the a/c, cold air only flows through the back seats. Another way to prevent getting this page in the future is to use Privacy Pass. How to add freon to your 2004 GMC Yukon: hook up the can of refrigerant (likely r-134a) to the low pressure port. If you put too much coolant into the system, you can really do some damage. It is entirely possible for your Yukon’s heater to work just fine even when the air conditioner is not blowing cold at all. It’s not hot or cold, just air. The rear ac is blowing ice cold. the rear unit fan, dampers, and hot water coil works like they are supposed to. But, if my understanding of AC systems is correct, I am going to have to discharge the system, replace the tube, draw the system down and then re-charge. DDaley: I have a 2004 GMC Yukon SLT with 5.3L V8. It can be tough to find why your Yukon’s heater is blowing cold. I know this is a common problem but I … But, using the info above about how and why a heater would fail can make it a lot easier. Please enable Cookies and reload the page. Re: AC blowing air but not COLD air May 09 2014, 4:05am More than likely you have lost freon, you can unplug the pressure switch on the dryer and jump the connector to make sure the compressor does engage. RepairPal will help you figure out whether it's your AC Refrigerant Leak, Climate Control Electrical Issue, AC Compressor, or something else. My 2000 Silverado RCLB was getting cold initially then dwindling down to just ambient air temps. Is there some switch that is having a problem or is there a way that I can increase the idle? However if you are low on freon with a truck that has front and rear ac then there will be a temp diff between the two. Perhaps … That’s why troubleshooting the air conditioner is totally different than troubleshooting the heater. After using the defroster, my 2002 Yukon with computer climate control won't switch to the main vents. ... You may not realize there's a refrigerant leak until the air conditioner stops blowing cold. It is actually as low as the crank shaft of the engine (this is how it is in my '04 Tahoe, which I … When I push the ac button, the motor does even drag a little like it used to when turing on the ac. It has its own belt, which does not drive anything else but just the AC compressor. This is a 2002 Yukon. It's blowing warm air through the front vents and blowing cold air in the rear. My 2001 Yukon Rear AC blows warm air. The rear A/C is blowing room temperature air or maybe a little warmer. my front ac works fine, its the rear climate control that does not work the fan doesnt blow cold or hot air im assuming its a fuse but i am unsure of which one to get any help would be greatly appreciated If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC. This AC problem is attributed to improper insulation of the motor and motor connection, causing the motor to freeze and preventing the motor from operating. The AC will finction, it provides cold air, but it only comes out of the defroster, or on the front vent setting, it blows air out of the floor & defroster. The refrigerant hose is the “high pressure side” hose and sees about 350 psi pressure when the A/C is running. 2015 Yukon XL Denali Air Conditioner Repair – I recently had a GMC Dealer repair my A/C, it was blowing not cold air. You don’t need to tolerate a stuffy, uncomfortable car, and you don’t need to rely on the shop to fix the problem either. Freon AC Refill: http://amzn.to/2HPlaLAHow to fix car blowing hot air when AC is on. The vehicle has dual climate controls. The refrigerant hose is the “high pressure side” hose and sees about 350 psi pressure when the A/C is running. When the Yukon is idling in drive the ac will not blow cold air. I’m having an HVAC problem. The Yukon seems to idle around 500-700, which I feel is too low. Having your car’s air conditioning go out suddenly can ruin your day fast. The fan will adjust from off and low to high. 2000 GMC Yukon. Undersized AC. shut truck off for a while then blow cold for 10 minutes then hot. Left to right works properly and all modes work properly. As it turns out, the AC system in Escalade, Silverado, Sierra, Yukon, Suburban, and Tahoe trucks stops working and ceases blowing cold air because of a defective bracket design affecting the A/C compressor and condenser line. The AC blower motor is not working properly in the Yukon XL. Faulty AC Remote Generally, large V-8 engines give off a lot of heat. Conclusion: Heat Not Working GMC Yukon. It was cold out and the heat would not work in the front only. The problem of your aircon being not cooling are commonly caused by these 10 aircon problems which we will discuss in detail today! The Yukon seems to idle around 500-700, which I feel is too low. You may need to download version 2.0 now from the Chrome Web Store. The TSB published by the manufacturer states that the blower motor stops working or continues to run in low temperatures. Asked by Visitor in Monticello, FL on . When the Yukon is idling in drive the ac will not blow cold air. 9. It still blows, just not cold. My 2001 GMC Yukon is only blowing cold air in the back. When get driving again the ac blows cold air fine, this is an intermitten problem. As it turns out, the AC system in Escalade, Silverado, Sierra, Yukon, Suburban, and Tahoe trucks stops working and ceases blowing cold air because of a defective bracket design affecting the A/C compressor and condenser line. 2003 yukon xl front a/c not blowing cold air.back working just fine. In fact, most won’t even cycle on without the right amount of refrigerant pressure. 2000 Tahoe A/C - front not cold, rear kind of cold. The 2016 GMC Yukon has 8 problems reported for a/c not working properly. The only thing that the air conditioning system has in common with the heater is that they both use the climate controls and the blower motor. The air just quit blowing out cold air. Freon AC Refill: http://amzn.to/2HPlaLAHow to fix car blowing hot air when AC is on. New compressor, condenser, accumulator, orfic tube and expansion valve. added r 134 last week ,with low side pressure of 70 psi,high side at 275 psi.what could be the problem {: ) … • The air just quit blowing out cold air. That heat eventually leaves the engine compartment and enters the cockpit through the air vents. One of the most inconvenient vehicular problems is when the A/C won’t blow cold air. Wrong thermostat settings. GMC Yukon Air Conditioning Not Blowing Cold Causes. A small AC in a huge room will always find hard to cool the room in peak summers. ... My truck started blowing “not cold” air after I changed a faulty blower resistor (which fixed my fan speed issues). Your IP: 145.239.197.118 May 24, 2010. The AC blow cold for about10 minutes then blow hot. 2002 Yukon rear A/C not blowing cold. Average repair cost is $1,170 at 59,800 miles. added r 134 last week ,with low side pressure of 70 psi,high side at 275 psi.what could be the problem Posted by … when i turn the control knob to cold i get no cold air. There are other issues that can cause this as well. We hope this article will greatly assist you in your aircon troubleshooting. Yukon / 2000 / front ac blows hot air rear... Front ac blows hot air rear blows cold. Ok, so now that … Continue reading "2004 GMC Yukon … The size of the AC should be according to the size of the room. The AC compressor is not driven by the fan belt. When in AC mode occasionally it will start blasting out hot air and the only way to fix is to shut off engine for a little while and it resolves. ... i have a 2005 yukon denali and the ac is not blowing cold. If your GMC Yukon isn’t keeping you cool, we’ve outlined some of the most common reasons why this might be happening. Cloudflare Ray ID: 61e9c8b9ee941f35 Average repair cost is $1,170 at 59,800 miles. 2003 yukon xl front a/c not blowing cold air.back working just fine. Performance & security by Cloudflare, Please complete the security check to access. I checked fuses under the dash and in the engine and they are all good. GM has issued a technical service bulletin (TSB) #04-01-38-013 to address an air conditioning problem where the air conditioning isn’t cold or the compressor doesn’t run. Checked the running pressure and it was to the low side of normal. If there is anything you would like to add, please leave a comment below. The 2016 GMC Yukon has 8 problems reported for a/c not working properly. When I push the ac button, the motor does even drag a little like it used to when turing on the ac. Also, the serpentine belt going to the water pump going bad can it not turn as fast as it needs to. Good luck! also no condensation is draining from front unit - Answered by a verified GM Mechanic. Lack of Refrigerant– Your Yukon’s air conditioner will not work if the refrigerant has disappeared due to a leak. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. AC not cold enough, Compressor doesn’t run, air conditioning not cold, Escalade, Avalanche, Silverado, Suburban, Tahoe, Sierra, Yukon. When get driving again the ac blows cold air fine, this is an intermitten problem. We have the SUV listed above XL Denali. • Turned out that the blend door motor was dead. In the front, it only feels like air is coming out. The AC blower motor is not working properly in the Yukon XL. Here are a few of the reasons why a car air conditioner may not be blowing cold air: Why is my car air conditioner not blowing cold air . 1 Answer. GMC Yukon AC Is Not Working? If there is a problem with your compressor or evaporator, adding freon will not restore cooling. the air is blowing out of the ceiling vents but not cold. I had a mechanic replaced all new AC parts on my 2002 GMC Yukon. If you still get cold air out of the rear vents but the front only blows hot air you may have a bad temp door actuator in the dash, it may be stuck on hot and not able to move to cold air. It may not be the easiest of tasks if you are not familiar with working with car air conditioners. Front A/C works fine and blows ice cold. I've read some of the responses, and most state it is the expansion valve. Whenever my mom turns on the a/c, cold air only flows through the back seats. These are a few of the most common issues that could cause your Yukon to not blow cold enough. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC. 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