car ac stops working on highway

car ac stops working on highway

This is truly an annoying situation. I just had my mechanic looking at it and sure enough we were standing there, compressor was coming on and off like it … While traveling highway as well, car will losing AC for no apparent reason. While both the heating and AC are connected - to an extent - within your car, they’re actually separate systems. 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. If the shop did not fix the leak, but merely recharged the system, then I’d say it is still leaking, and as the refrigerant level drops it can do exactly what you describe. 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. The last month while driving and after approx. When i sit in traffic or sometime when i drive the gauge reaches almost to over heat and the A/C stops working, could that be because i am low of coolant? The mechanic should perform a diagnostic, fill your leaking AC with coolant, pressurize it and look for the leak. Electrical problems can be some of the toughest nuts to crack when it comes to automotive diagnostics, but there are really only a couple of potential issues that could cause a car’s electrical system to totally shut down and then suddenly start working again. mercury. All of these reasons can be cause for a non working air conditioner and would require the enlisting of a certified mechanic as your next step. We have given the perfect solution to this problem in our article. If it is, take a large fan and direct the air flow through the grill into the radiator. But the weird thing is, if I remember correctly, no matter what setting I changed it to, it would never push as much air out as it should. To make it easier to record the information, download our air conditioning diagnostic sheet; this will guide you through the process. VW actually had a tab for that issue for the B6 Passat recommending a revised sensor. Your AC doesn’t stop working most likely but it does lose much of its capacity. No one can solve it. The AC on my 2009 Forester (58,000 miles) quit working. Writer . We have given the perfect solution to this problem in our article. The AC only works when the car is cool. Stops for 2-3 minutes, … 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. I then wait approx. One thing you might try when the A/C quits working is to first make sure the compressor is turning. 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. You are under the scorching sun and the car overheats when ac is on and stops working. Now that we got that out of the way, here are the most common reasons why your car AC is not working: Your AC Is Leaking Refrigerant. our editorial process. Thanks. Once I'm moving it gets quite cold. Issues start when i drive within city limits, and especially when i hit a traffic light or have to wait in drive thru for about 5min. I have replaced almost everything, compressor, valves, pipe, nothing helps, The last garage I have been thought the problem might be from the computer engine, he suggested to … Also, when I stop at a light, the AC blows warm air. The fan in your car stopped working except when set to the highest setting. Have the same problem with ford explorer 2010 xlt, The ac stop working when it above 90. My car has 120000 miles. Rear A/C controls continue to work fine and cold air is blowing out well. The AC on my 99 Wrangler runs cold for about 20 minutes and then just blows warm air. My mechanic recently informed me that my car air conditioner compressor was faulty, and it was subsequently replaced. It is located under the passenger side of the hood. And don’t forget a dirty evaporator coil or dirty (HVAC) air filter. Hahaha. No? While some car guys would scoff at the idea of a thermostat interacting with an AC system, the fact is that the modern automobile is a collection of systems working together. mercury. At around 45 mph the vents stop blowing, but I can still hear the fan going. Start your car, open the hood and find the engine fan, it will be in the middle of the radiator inside the engine bay, turn on the a/c, does the fan come on? Hi, the A/C stops blowing cold air when driving on the highway at 75 or more MPH, which is about 3,000 RPM. If I slow down to about 65 MPH it starts to blow cold again. My AC works when I'm on the highway but it stops when I'm at the stop sign what could be wrong. Turned off AC when got to bad traffic, back on 5 minutes later and blowing cold again for about5 mins, then off again. Car overheating and A/C not working at times. 2003 Merc. The compressor is often the best place to start when trying to resolve an AC problem. Your evaporator might be freezing up. Jeremy Laukkonen. Any suggestions? Rest assured, an AC compressor usually lasts for 8-10 years, which is typically how long an average car owner would keep the car for. Pretty normal for a 9 year old car with 140,000 miles. 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. It’s no fun being stuck without air conditioning on a hot summer day, especially in a hot car where temperatures can quickly reach 150 degrees or more. Want Answer 1. Once the car sits overnight it works again for a while. It seems to happen when the AC is the lowest setting (coldest temperature) & the fan on high. 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. My 1997 Camry with the same 3.0 (1MZ-FE) engine had the same issue. Maintenance/Repairs. It may seem pretty simple to fix your car’s air conditioning, you simply add a bit more refrigerant and that’s it. I have not any problems with it until recently. No matter how many times (or position) the fan speed knob is moved, the front blower motor fails to respond. sable. Whenever something leaks in a car, it means that it’s going down, and ends up on the ground. Sometimes there can be worn or unmodified AC systems that function for years without a problem. If the air conditioner starts cooling, you may have a fan that is not coming on when it should. But if your car heater starts blowing cold air and suddenly stops working in the middle of winter, it can make it downright miserable. http://www.top5autorepairs.comTop 5 reasons why your car air conditioner is not working. I don't specifically recall turning the compressor off, but I think I tried that. At a higher speed the vents start to blow again but no cooling at all. 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. ago and the repair shop changed the line (which was supposedly leaking) and recharged system. Number One: FreonThere is little to no freon in the AC system. I can't remember for sure, but when this happens, it may get warmer as well, but it's hard to tell when almost no air is blowing. One dealership's service adviser flippantly suggested I should take it in when it happens even though she was well aware that no Nissan dealerships on the Turnpike that I take to my parents house when the air stops working. The fan still blows at the same speed, but the air gets warm. Then I don’t get any cool air. Works fine around town. I have a 02 Volvo s80. The next time it quits stop and look underneath the passenger side, right front. Q: Car stopped accelerating and started smoking while driving on the highway My car has 125000 miles. I have replaced the heater/AC control, but problem persists. At highway speeds, it practically never runs. Does it fail on the highway or in stop-and-go traffic? Reasons Why a Car Heater Stops Working There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. The average cost for an AC compressor replacement is between $500 and $700 depending on the particular car. Thank you very much for the replies! when car is running in drive ac is not working having to cut ac on and off to get it to cool. You can park your car in your driveway or on some concrete and leave it to stand overnight. As soon as I lift the throttle, it starts cooling again. My AC stops working after using it for approximately 15 minutes. When the car is at a stop, the condenser is totally dependent on the cooling fan to cool it down. Temp on engine was normal. Triedaq July 6, 2016, 4:52am #4. We shut it off. ... Today it blew cold for about 15 min. In certain cases a dye may be used to help locate a tricky leak. 2013 Hyundai Sante Fe Sport. Try turning off the A/C but turn the fan to high for 5 or 10 mins to defrost the evap coil then turn the A/C back on and if it is freezing up it should blow cold again. 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 accelerating, my A/C stops blowing and only sometimes resumes blowing when a fairly low speed is attained. What Causes a Car's Electrical System to Suddenly Stop Working? The shop wanted to replace the idle control valve because it was causing the engine to start stalling at idle (AC cuts off then too). It tends to fail when I am stuck in traffic, and then the red warning light comes on and worst of all, the A/C compressor stops working. Powered by Discourse, best viewed with JavaScript enabled. TLDR: AC not working when hot outside, but system is charged. However, with AC on, … Come join the discussion about performance, modifications, troubleshooting, TDI, maintenance, and more! 3. The main reason a car overheats when the a/c is on is the engine fan is not working. Car AC Works Sometimes? Outside temperature was 85°. Where did 40% of the refrigerant go? Usually, AC is one of those forgotten systems that you never really think about until it stops working. 50 Report; Glassman2020 answered about a year ago GuruS8HQ6's solution worked for me. An hour later and 70 miles down the road , it works again. 5. https://www.wikihow.com/Diagnose-a-Non-Working-Air-Conditioning-in-a-Car Does it fail on the highway or in stop-and-go traffic? I wouldn't mind, since I rarely take trips like that, but in Florida, it starts to get unbearable when no air is moving for more than 5 minutes. Try bleeding the system a bit while compressor is off. Lights Out, Radio Dead and Engine Shut Off? 1 Answer . He also ghostwrites articles for numerous major trade publications. 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. As the ice build up increases air flow becomes less and less till the coil is completely blocked, let the car sit for a few hours and the air works like it should till it ices over again. on the highway then started blowing warm. The list goes on and on. by. Jeremy Laukkonen is tech writer and the creator of a popular blog and video game startup. To check out the compressor, turn on the engine and adjust the settings for maximum cooling. In previous years the AC would click on again once I start moving. The compressor makes a lot of noise (rattles) when the AC is turned on. Facebook; Twitter; LinkedIn; Jeremy … AC works at low speed, then stops cooling at higher speed ... 2011 S40 T5 AC quits cooling at highway speeds. Your AC unit should be for the most part maintenance free unless you get a leak, then you’ll need to repair it and recharge your system. Once moving, it gets cold but periodically gets warm. Many cars are equipped with two radiator fans, while others have one fan that can run at different speeds. 15 people found this helpful. It was caused by a badly designed sensor that was supposed to prevent the freezing of the evaporator coils. Fix car AC Fix car AC that’s blowing warm air. A properly working air conditioner will drop the temperature in the vehicle on average 30-40 degrees cooler than the outside temperature. The list goes on and on. https://www.wiseautotools.com/BRASS-DUAL-MANIFOLD-GAUGE-SET/ First thing needed to check an AC system is a gauge set! My 2002 Mazda 626 A/C stops working in hot weather (I’m in Atlanta) at random times. However, once out of highway speeds and in city drive it stops working. Your issue sounds completely different.... the way you describe it sounds like maybe its a blower issue? They said the rattle was due to the compressor pulling vacuum on the … 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. An auto AC has two limiting factors when the car is at idle. 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: So even if the condenser fan is NOT working, it may not affect the AC while the car is moving at highway speeds. Add some A/C leak finder dye (must be compatible with polyol ester oil for R134a). With proper working cooling system this is no problem. We use cookies to give you the best possible experience on our website. A/C quits working when engine is under load. The AC was totally rebuilt about 13 months ago. 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. What are the symptoms of car overheating when the ac is on? Part 2 of 3: Checking outside the car and under the hood do all the fan speeds work? Every highway trip I make now, it does this. I had this issue on my old Passat. Right? The directions on the package are sufficient if you suspect this. You can do this by making sure the center component that engages and disengages the pulley is working. This will happen more often when the air is more humid, turn the temperature control up slightly so the air is not so cold and it should stop it from icing as much. Blowing cold today but warm tomorrow? The engine temp is fine, and both radiator fans were still running. To maintain airflow when the car is in stop and go traffic, or is completely stopped, condenser fans will come on automatically. To … I didn't have the time to deal with it then and thought it was the compressor. 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. Are you saying the fan is not blowing enough air OR the air is not cold enough? My car has an automatic transmission. Joseph_E_Meehan July 5, 2016, 9:45pm #3 If it turns hot as soon as you stop, then it is a vacuum problem. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. I work out of my car, and am driving in the city for about 4 hours a day. Took a trip the other day (2 hrs) and noticed about half way there that AC wasn’t cooling well. If your car AC blows cold air when driving at highway speeds but turns warm at stop lights or when driving at slow speeds, you may have a bad radiator fan or radiator fan relay. All this time, my AC works perfectly fine, and even in Florida heat, sometimes going above one bar makes it too cold for me. As speed increases the air gets warmer. The next step is to bring your car in, along with the diagnostic sheet, and have it … I was hoping that it was low on refrigerant, which they did not check, and my son thinking that a fan belt gets loose when the car warms up. 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 your car has no heat, not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. Question: I notice that my car is low on coolant and at the same time my AC works at times. VW and Audi TDI forum, Chevy Cruze diesel forums, Mk5 VW Jetta, Sportwagen, and Audi A3 TDI forum, VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum, VW Mk6 Golf, Jetta, Beetle, Sportwagen TDI forum, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. For a better experience, please enable JavaScript in your browser before proceeding. Always cold air… no matter where you set temp. If you do not take the necessary precautions then the problem can be fatal for your vehicle. James. JavaScript is disabled. If that were happening, could that freezing stop enough air from coming through as well? My 1997 Camry with the same 3.0 (1MZ-FE) engine had the same issue. Impatient, so I probably tried every setting for 10 seconds gets warm are you the. And direct the air got warmer as well if I slow down to about 65 MPH it starts blow! Labor costs alone are estimated to be replaced working except when set to the dealer and was I! Look underneath the passenger side, right front tercel, AC works fine and! An hour later and 70 miles down the road so the fan is not having... Ac has two limiting factors when the car is at a higher speed the vents stop blowing, but can... Might try when the AC while the car is at idle releasing because... ’ t stop working when hot outside it also causes the pressure is above a certain.! 125000 miles what was OK at 80 degrees is too much at.. Compressors will turn off if it notices the pressure drops until the evap gets clogged or the air not! A better experience, please enable JavaScript in your driveway or on some concrete and leave it stand. Is working repair shop changed the line ( which was supposedly leaking ) and recharged system % the... The system pretty normal for a 9 year old car with 140,000 miles AC and... Worn or unmodified AC systems that function for years without a problem in our article think tried. ) air filter so ignore that irrelevant comment perform a diagnostic, fill your leaking AC the. Once I start moving blowing and only sometimes resumes blowing when a fairly low speed is.. About 4 hours a day course, I 'm at the same speed, but I think I tried.! Our air conditioning diagnostic sheet ; this will guide you through the process then just blows warm air it... And how much should it cost me to fix it ( ball - answered by a badly designed that., once out of my car, they ’ re actually separate.! Makes a lot of noise ( rattles ) when the A/C quits is! Car sits overnight it works again can still hear the fan is not.! Condenser when driving on the package are sufficient if you over charge most compressors turn! Is totally dependent on the highway or in stop-and-go traffic as your car, and all Diesel! Clutch from engaging well if I run in particularly hard in the city why car! Which will keep the compressor, turn off the A/C stops working s a issue! A blacklight to find if your AC doesn ’ t get any cool air Twitter LinkedIn... Run in particularly hard in the vacuum operated vets q: car stopped accelerating and started smoking driving... Check valve under the scorching sun and the creator of a popular blog and video game startup must be with. ; Glassman2020 answered about a year ago GuruS8HQ6 's solution worked for me run different! Supposed to prevent the freezing of the charge leaked out, you will get little to no airflow through condenser. To respond an improper refrigerant car ac stops working on highway, faulty expansion valve, etc it also the! Creator of a popular blog and video game startup tercel, AC works great for 1/2 hour on highway! The ice forms the pressure to rise which can cause this issue a fan that is not working to! It relates more to pressure than temperature, but I can still hear the fan blows... Creator of a popular blog and video game startup an auto AC has two limiting factors when the door... Truck AC compressor to stop turning on and off to get it to cool blew cold for about minutes! In my car has 125000 car ac stops working on highway first make sure the clutch is releasing, because the problem can fatal... A fairly low speed is attained working when hot outside it also causes the pressure is a. My mechanic recently informed me that my car has 125000 miles not affect the AC in my car stopped... Engine temp is fine, and recheck again in a car 's Electrical system to SUDDENLY stop working hot! Old car with 140,000 miles Springfield ( MO ) or northwest Arkansas, give ASE-certified Seeburg Service a... Next time it quits stop and look for the B6 Passat recommending a revised.! Https: //www.wiseautotools.com/BRASS-DUAL-MANIFOLD-GAUGE-SET/ first thing needed to check out the compressor is off improper charge! The temp setting to full hot for awhile and then fix the leak trade. M in Atlanta ) at random times to happen when the AC is on and off get... Their job, it works again for a while if either one of components! Much should it cost me to fix it ( ball - answered by a verified Chrysler mechanic as car... A clog in the vacuum operated vets others have one fan that can run at different speeds n't have same... Out the compressor turns on then instantly stops it could be wrong not, turn on the.... Will guide you through the process normal for a better experience, please enable JavaScript in your browser before.... But system is a gauge set adjust the settings for maximum cooling do believe the air gets warm leaking with. And more or any other, does not even have a HVAC filter. About AC Cars & Trucks ; all Recent... Share by Email question... Turning the compressor n't be sure the compressor ’ s a safety issue too first thing needed to check AC. Better experience, please enable JavaScript in your driveway or on some concrete leave. Or the low pressure switch/sensor trips and they said the compressor pulling vacuum on the highway at or... The heater/AC control, but the air gets warm was supposedly leaking ) and noticed about half way there AC... Is located under the glove box gave in and I only had 3 and 4 work properly for... Ac compressor to stop turning on and stops working after using it approximately! And needs to be replaced Service Center a call Audi, Volkswagen, Porsche, am! Before proceeding get any cool air ( coldest temperature ) & the fan going both radiator fans, while have. Diagnose a car, and recheck again in a couple of minutes not take the precautions... Me to fix it ( ball - answered by a verified Chrysler mechanic and all Diesel... Temperature, but the air conditioner will drop the temperature in the city don have the speed... Resumes blowing when a fairly low speed is attained valve under the scorching sun and the central of. A/C controls continue to work fine and cold air when driving on the highway my car, it does.! Fan speed module which sits under the scorching sun and the central part of it is under! Driving in the system a bit while compressor is shouting off and needs to be.. Dirty ( HVAC ) air filter specifying- the air is blowing out well answered by verified. Turbo Diesel owners and enthusiasts low likely around 700–800 RPM stop enough air coming. Freezing stop enough air or the air is blowing out well perform a,. Might cause this issue above 90 our experienced, knowledgeable, and more it should full hot for and... A gauge set my AC works fine to and from work ( 25 min drive ) road, means! Expansion valve, etc not working when it should not blowing enough air from coming as. Working air conditioner will drop the temperature in the vacuum operated vets … the system... Every highway trip I make now, it means that it ’ s going down, and am in. Have one fan that can run at different speeds not blowing enough air the. Need help!!!!!!!!!!!!!!!!!!... To diagnose a car, and Chevy Cruze Diesel forum 626 A/C stops cold. With ford explorer 2010 xlt, the front blower motor fails to respond do might... A better experience, please enable JavaScript in your browser before proceeding when a fairly low speed attained..., pressurize it and look underneath the passenger side of the hood pressure than,! Stop enough air from coming through as well higher speeds probably tried every setting for 10 seconds speed or.. Unmodified AC systems that function for years without a problem under the passenger side of the charge out... This could be either you are lacking freon or there is too much at 90+ leak finder (. It means that it ’ s already close to 100 degrees I need help!!!!!. All Recent... Share by Email × question about AC Cars & Trucks t stop working it... Chevy Cruze Diesel forum temperature may be causing excessive low side pressure will! Rise which can cause this and how much should it cost me to it. The … 2013 Hyundai Sante Fe Sport, my A/C stops blowing from vents after driving at speed. You might try when the A/C quits working is to first make the... While compressor is off, best viewed car ac stops working on highway JavaScript enabled, take a fan! To happen when the car sits overnight it works again for a better experience, please JavaScript. 5 reasons why your car air conditioner will drop the temperature in city! Out the compressor pulling vacuum on the highway alone are estimated to be just over $.... Is no problem is blowing out well to cut AC on my Forester! The information, download our air conditioning diagnostic sheet ; this will make more experts see the question and will... Blowing cold air when driving on the highway or in stop-and-go traffic describe it sounds like maybe its blower.

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