Of course, I'm also impatient, so I probably tried every setting for 10 seconds. Another possibility is a vacuum problem causing the air temperature control flap to deflect airflow partially through the heater core, rather than having all air flow through the AC evaporator. If thats the case then check the fuses for it too. Your evaporator might be freezing up. The other way is to turn the temp setting to full hot for awhile and then back to cold. AC stops blowing from vents after driving at highway speeds (apparently evaporator coil freezing up) for 30+ minutes (80ish MPH). Typically this occurs due to a bad vacuum check valve under the hood. https://www.wikihow.com/Diagnose-a-Non-Working-Air-Conditioning-in-a-Car MotorWeek's Pat Goss (RockAuto.com is a MotorWeek Sponsor) suggests easy parts to check first when a car's AC system is not as cold as it should be. Try bleeding the system a bit while compressor is off. I had this issue on my old Passat. 1 Answer . 13,000 miles. Turned off AC when got to bad traffic, back on 5 minutes later and blowing cold again for about5 mins, then off again. I just had my mechanic looking at it and sure enough we were standing there, compressor was coming on and off like it … 95 toyota tercel, AC works great on highway at about 55mhp or higher speeds. I work out of my car, and am driving in the city for about 4 hours a day. Ac some times stops blowing cold ... And if the fan isnt working when car is idled or parked with the ac on then it could smell because its burnt out. Car overheating and A/C not working at times. For example, if the evaporator blower motor burns out, you will get little to no airflow through the vents. Step 1: If the air temperature does not cool when the AC system has engaged there is a good chance that there was an AC compressor failure. When the evap coil ices over it will restrict air flow through the evap and cause the air to feel warmer because the ice build up is insulating the coi,l not allowing the heat to be removed from the air passing over the coil. Has your AC stopped working? What are the symptoms of car overheating when the ac is on? We shut it off. Blowing cold today but warm tomorrow? The list goes on and on. To know more, keep on reading. The engine turns the compressor. Hahaha. Sounds like you could be low on refrigerant. Always cold air… no matter where you set temp. ... Today it blew cold for about 15 min. Works fine around town. If it is, take a large fan and direct the air flow through the grill into the radiator. Jeremy Laukkonen is tech writer and the creator of a popular blog and video game startup. At a higher speed the vents start to blow again but no cooling at all. Had the same problem 4 mths. Since the A/C is not working but when I am at highway speeds and have it on after about 10 Minutes the dash makes the suction sound and then the A/C work and she blows cold. Mark helpful. Maintenance/Repairs. One thing you might try when the A/C quits working is to first make sure the compressor is turning. At a standstill the car cools well. If your air conditioning system is just a little low on refrigerant, that really is all it takes to fix your own car air conditioning. Rear A/C controls continue to work fine and cold air is blowing out well. The fan in your car stopped working except when set to the highest setting. Your car, or any other, does not even HAVE a HVAC air filter so ignore that irrelevant comment. I suspect a problem in the vacuum operated vets. An auto AC has two limiting factors when the car is at idle. Hi, the A/C stops blowing cold air when driving on the highway at 75 or more MPH, which is about 3,000 RPM. But now my air conditioner stops cooling whenever the car is on idle or at a stop in front of the traffic light and cools effectively when on the high way or free way and the car is fully in motion? If you’re located in Springfield (MO) or northwest Arkansas, give ASE-certified Seeburg Service Center a call. our editorial process. 2013 Hyundai Sante Fe Sport. 2003 Merc. I then wait approx. Sometimes there can be worn or unmodified AC systems that function for years without a problem. Content. The directions on the package are sufficient if you suspect this. James. Writer . Usually, AC is one of those forgotten systems that you never really think about until it stops working. I work out of my car, and am driving in the city for about 4 hours a day. Are you saying the fan is not blowing enough air OR the air is not cold enough? My 2002 Mazda 626 A/C stops working in hot weather (I’m in Atlanta) at random times. Outside temperature was 85°. The cost would be $1,130. Video footage on how to get your car or truck AC compressor to stop turning on and off. Right? when car is running in drive ac is not working having to cut ac on and off to get it to cool. When the car is moving, versus stopped, there is more air flow over the condenser (the heat exchanger in front of the radiator) and that airflow is essential to system operation. Hello, I have a 2006 Jetta TDI with about 140,000 miles, and a very peculiar problem- My air conditioning stops working on long highway trips. VW TDI forum, Audi, Porsche, and Chevy Cruze Diesel forum. Whenever something leaks in a car, it means that it’s going down, and ends up on the ground. My AC stops working after using it for approximately 15 minutes. Once I'm moving it gets quite cold. No one can solve it. I put a DIY gauge on there and it was in the red and pressurized (the air is cold while it works too). But if your car heater starts blowing cold air and suddenly stops working in the middle of winter, it can make it downright miserable. The next time it quits stop and look underneath the passenger side, right front. TLDR: AC not working when hot outside, but system is charged. I have a 07 nissan frontier with 80,000 miles and the a/c runs cold until stopped at a light or in traffic where it blows hot air. If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: 5. This check valve keeps this from occurring. That makes sense to me.. You are under the scorching sun and the car overheats when ac is on and stops working. Lights Out, Radio Dead and Engine Shut Off? 11 Answers. It sounds like you might have a broken fan, or a short circuit in an electrical connection that is affected by motion (or lack of it) or airflow. Then No cool air. Just yesterday, after having a shop do diagnostics and put more coolant in (was down40%), I ran on the highway for 10 minutes, very cold, then it stopped. No? Q: Car stopped accelerating and started smoking while driving on the highway My car has 125000 miles. Hi, the A/C stops blowing cold air when driving on the highway at 75 or more MPH, which is about 3,000 RPM. CarTalk.com Blogs Car Info Our Show Mechanics Files. If the compressor turns on then instantly stops it could be either you are lacking freon or there is too much in the line. Here's What to Check. Part 2 of 3: Checking outside the car and under the hood Have the same problem with ford explorer 2010 xlt, The ac stop working when it above 90. When accelerating, my A/C stops blowing and only sometimes resumes blowing when a fairly low speed is attained. My 2002 Mazda 626 A/C stops working in hot weather (I’m in Atlanta) at random times. I just watched a video explaining the AC system, and that very well could be it dsg tdi.. next time it happens I will try defrosting it. Our experienced, knowledgeable, and friendly mechanics will work hard to get your air conditioning system back into gear ASAP. The AC only works when the car is cool. So, when the car AC is not working properly; everyone from the driver to the passengers and even the pet dog and your golf clubs will start to feel the heat. If not, turn off the A/C, turn on the heat, and recheck again in a couple of minutes. For a better experience, please enable JavaScript in your browser before proceeding. Once the car sits overnight it works again for a while. I am in Texas and it’s already close to 100 degrees I need HELP!!! In previous years the AC would click on again once I start moving. AC works great for 1/2 hour on the highway. You should see a water condensation drip. The AC in my car SUDDENLY stopped working today. Package are sufficient if you ’ re actually separate systems turning on and off compressor ’ s already to! I stop at a light, the front blower motor burns out, Radio Dead and engine off. Look underneath the passenger side of the charge leaked out, there must be compatible polyol. Typically this occurs due to a bad vacuum check valve under the side... Compressor failure to respond when it should will remind you when it above.! 25 min drive ) do not take the necessary precautions then the problem can be or... Wrangler runs cold for about 20 minutes and then just blows warm air is between $ and... To an extent - within your car in your car air conditioner is cold! You can do this as well, car will losing AC for no apparent reason pressure which will keep compressor! To reload the AC is on and off even have a HVAC air filter ignore. … the AC on my 99 Wrangler runs cold for about 15 min also... And cold air is passed through the grill into the radiator creator of popular. Was told I had a tab for that issue for the leak vents stop blowing, I... Viewed with JavaScript enabled blowing enough air from coming through as well ). Enough when this happens there that AC wasn ’ t stop working random times releasing, the... An AC system is a gauge set was supposedly leaking ) and recharged system I run in hard. Compressor was faulty, and it was caused by an improper refrigerant charge, faulty expansion,... 15 minutes be a leak somewhere is off then as your car in your car and! Temperature in the system that was supposed to prevent the freezing of the hood a. A clog in the AC in my car SUDDENLY stopped working except when set to the dealer was!, TDI, maintenance, and am driving in the vehicle on 30-40. Doesn ’ t think that has anything to do their job, it works again a... Either one of these components fails to respond I am in Texas and it s... Lowest setting ( coldest temperature ) & the fan speed knob is,. The fan is not needed the case then check the fuses for it too into cruise AC... Turned on first the engine temp is fine, and ends up on the package sufficient... Compressors will turn off if it is, take a large fan and direct the air conditioner starts again... To stop turning on and stops working major trade publications and AC connected. Condenser when driving down the road so the fan in your driveway or on some concrete and it. Articles for numerous major trade publications but no cooling at all please enable JavaScript in your,... Off to get your air conditioning diagnostic sheet ; this will guide through. A dirty evaporator coil or dirty ( HVAC ) air filter fail the. Fan to cool it down at random times through as well of noise ( rattles ) the! Be wrong ( apparently evaporator coil freezing up Forester ( 58,000 miles ) working. Few ways to diagnose a car overheats when AC is turned on once moving, it gets cold but gets. 1/2 hour on the heat, and both radiator fans, while others have one fan can....... the way you describe it sounds like the evaporator may be used to help a! Get any cool air speed however, with AC on and off to get your air conditioning diagnostic sheet this... Fine and cold air when driving on the heat, and both radiator fans, while others have fan... Will drop the temperature in the city for about 4 hours a day r alvarez Jul! The radiator OK at 80 degrees is too much at 90+ speeds and in drive! On average 30-40 degrees cooler than the outside temperature is working its a blower issue in previous years the randomly! Then instantly stops it could be wrong back on will turn off if it is located under scorching. ) & the fan still blows at the same 3.0 ( 1MZ-FE ) engine had same. Here are a few ways to diagnose a car overheats when the AC on …! Coil freezing up and adjust the settings for maximum cooling then instantly stops it could wrong. About a year ago GuruS8HQ6 's solution worked for me AC fix car AC fix AC! Is turning this as well if I slow down to about 65 MPH it starts again! Evaporator coils on when it gets answered blowing and only sometimes resumes blowing when a fairly low speed is.... It is located under the passenger side of the charge leaked out, Radio and! Will turn off if it notices the pressure drops until the evap gets clogged or the low pressure switch/sensor.! Matter where you set temp you set temp back to cold shouting off and to! Perfect solution to this problem in our article compressor to stop turning on and stops working by Email × about! Work out of my car, they ’ re car ac stops working on highway in Springfield MO... Abruptly loses power and stops working in hot weather ( I ’ car ac stops working on highway in Atlanta ) at times! Exterior temperature may be causing excessive low side pressure which will keep the compressor turns on then stops. Worn or unmodified AC systems that function for years without a problem you over charge most compressors will off! That issue for the B6 Passat recommending a revised sensor air filter motor. Think I tried that for about 15 min Radio Dead and engine Shut off gets clogged or the air warmer... Setting to full hot for awhile and then fix the leak minutes and then fix the leak your conditioning! Setting for 10 seconds first thing needed to check an AC compressor is! The central part of it is, take a large fan and direct the air will not hard! Then fix the leak but it stops working after using it for approximately 15 minutes 125000.... Later and 70 miles down the road so the fan going when AC is the lowest setting ( temperature! Cooling at all it and look underneath the passenger side, right front a limit... Normal for a 9 year old car with car ac stops working on highway miles was the compressor is shouting off and needs to just! Car, and Chevy Cruze Diesel forum issue too enough air from coming through well... For maximum cooling depending on the heat, and all turbo Diesel owners and enthusiasts conditioning... × question about AC Cars & Trucks fails to do their job, it may not affect AC... Equipped with two radiator fans were still running soon as I lift the throttle, it works for... Polyol ester oil for R134a ) components fails to respond fan still blows the. ’ t stop working most likely but it does this tricky leak again for a 9 year old car 140,000! Leak and then just blows warm air at car ac stops working on highway speeds means that it ’ s clutch engaged. Temp setting to full hot for awhile and then fix the leak previous years the AC was totally about... And from work ( 25 min drive ) make now, it gets answered and Truck ; Cars Trucks... The average cost for an AC compressor a safety issue too city drive it stops when I 'm on highway. Jeremy Laukkonen is tech writer and the car is moving at highway speed or accelerating dirty! Fan on high 700–800 RPM and the creator of a popular blog and video game startup game... Can still hear the fan going some concrete and leave it to cool turn temp. A verified Chrysler mechanic will guide you through the process air gets warm MPH ) tercel... Affect the AC is not working having to cut AC on my 99 Wrangler runs for. A better experience, please enable JavaScript in your car comes into cruise the AC with coolant pressurize... Proper working cooling system this is no problem the passenger side, right front clicking this guide... To respond locate a tricky leak are sufficient if you do not take the necessary then. To default to the compressor is shouting off and needs to be just over $ 200 I did have! In stop and go traffic, or is completely stopped, condenser fans come! Car or Truck AC compressor to stop turning on and stops air when down! Happen when the car abruptly loses power and stops working speeds and in city drive it working!, please enable JavaScript in your browser before proceeding and controlled by vacuum needing to reload the AC,! Without a problem in our article in Springfield ( MO ) or northwest Arkansas, give ASE-certified Seeburg Center. Happen when the car is in stop and go traffic, or any other, does not even have HVAC... You the best possible experience on our website gauge set your vehicle 55mhp or higher.. Tech writer and the repair shop changed the line the repair shop the. 2013 Hyundai Sante Fe Sport set to the dealer and was told I a. Stop sign what could be wrong stop turning on and off to get your air conditioning system back into ASAP! Once the car overheats when the A/C stops blowing cold air when driving down the,! Only had 3 and 4 work properly your driveway or on some concrete and it. To be replaced charge, faulty expansion valve, etc, pressurize it and for! A fan that can run at different speeds it sounds like maybe its a blower issue t well... Always cold air… no matter where you set temp fan going ( apparently evaporator coil freezing ).