Car Ac Blowing Warm Air Intermittently

In fact, every time I accelerate it goes warm. 2007 CRV, 120k miles, running great. The entire way down it didn't blow any cold air. This week I noticed it blowing warm air during the hottest parts of the day (afternoon, about 90+ out) and set thermostat down from 80 to 79, but then got up to 84 in the house, AC just running non-stop but blowing warm air. The HOT air situation is puzzling, but seeing as it's an auto AC system, perhaps it is mixing cold and warm air, and with the evaporator not cold, you're getting only the heated air. Check if the AC Radiator fan has conked off. They said I had the correct amount and since the AC was now blowing ice cold I chalked my warm air from the previous day up to a fluke. When the A/C starts blowing warm, turn the ac OFF then ON, observe the VOLT reading. My 2004 Camry AC has started blowing warm air. Intermittent overheating, AC blows warm. After going a few morw miles in town I tried the AC again. I turned off AC. No particular rhythm to it. If the air is warm to cool, but not cold as it should be, there may be an issue with air flow. If I am in traffic, at a stop light, getting drive through, or parking the car, it quickly gets dangerously hot. the exact same a/c problems started up again - intermittent cold air / hot air when a/c is on. This week I noticed it blowing warm air during the hottest parts of the day (afternoon, about 90+ out) and set thermostat down from 80 to 79, but then got up to 84 in the house, AC just running non-stop but blowing warm air. 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. I got in it to run an errand and even on max AC the air coming out of the vents was not cold even after about five miles. Ever since then though, the central air conditioner blows cold only intermittently. Lots of great information on this discussion site. only blows cool when car is in motion. Not sure what causes it, but the only solution I have found so far is to red line the engine and that seems to "kick" the AC. Then, gradually, you began to notice that it wasn't really blowing cold air anymore, or that it would only blow cold when the car was moving but not at idle. After it was done, i decided not to pull down teh window or else the windows would get wet. AC blowing warn air intermittently. The A/C in my car blows warm air intermittently. The 2016 Hyundai Tucson has 28 problems reported for a/c intermittently blows warm air. My 2012 Titan has recently been acting quirky with the AC. Probably like 85* or so. so i got my spring waxing for my car yesterday. This will allow you to enjoy your air conditioning once again. The A/C on my 2009 Honda CRV faile intermittently. Add this to the list of Subwoofer, CarPlay, Tranny, Gas Door Flush, etc. 2010 Ford Edge. One day the blower worked but only hot air with AC. Getting to the root of the problem can take some time and effort, but we have simplified the process by providing you with the most common A/C problems along with how to resolve these problems once they’re discovered. So if this is how they still heat them newfangled automobiles, then your car is probably running coolar than usual. If your air conditioner is blowing warm air, or just not working properly, it is best to schedule a service ASAP to maximize your comfort. This may be due to a faulty heater blower. When I'm at a red light or idling or driving slow very long my ac starts blowing warm air and my engine will over heat. (should be colder - 40 degrees) The Ford Dealer discovered there was too much (1234yf) FREON (factory fill) in the AC system ! They explained , this would cause the AC to shut down. Electrical Issues. Feeling a bit frustrated? We know the feeling. We had a pretty warm day and I decided to try out the air conditioning. I went for a drive and it would come on and blow cold and then suddenly go back to blowing warm air, back and forth, at random. Sometimes when we have the AC on the vents start blowing warm or hot air instead of 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. set it to 4 cold air blows for about 3 minutes, press max ac I immediately get warm air. Recently, my AC started blowing extremely HOT (hotter than the normal heat). Core case seals, blower house seals or evaporator core case seals; All can open up and diminish air flow. My 08 Tahoe started blowing hot air from the passenger side vents. a/c blows warm at idle. Car air conditioner working intermittently? For the past YEAR my cars a/c works intermittently, I have any theories: when it's hot, the ac blows out room temp air and 10-20min later ac will kick on, when it's cold out ac works fine, when it's not working and I hit a bump in the road it works again. If you are sitting still put the truck in neutral or park and rev the engine to 1500-2000 rpm. Once it gets hot outside or the car gets in traffic, the compressor shuts off and may not come back on unless I turn the car off for a while. if so, you'll need a new condenser. While there are many, many reasons your air conditioner is blowing hot air, we'll run through the most common causes that you can fix or diagnose on your own. I thought it was the ac compressor and just bought a new one to replace the old one with I thought it was just failing but because it works when is cool out in having second thoughts. I am the owner of a 1992 Subaru SVX. This 2004 Chevrolet Tahoe came in with the complaint that the air on the driver's side would change from cold to hot while driving down the road. Use this guide. The Refrigerant is fine. If I turn off the AC, the air coming out is then hot. I've suddenly had this problem as well, ac blowing intermittent cold then warm humid air. I just went under the hood and found something no one has mentioned. We stopped several times to have the AC looked at. only blows cool when car is in motion. The air conditioning is intermittent. Search the forum for "blend door" When you say "can't get it to engage consistently" I assume it is still blowing air out the vents just not cold air. Turned out it was the AC relay switch in the fuse box under the hood, I swap it out with the horn relay switch (they were the same type relay switch) the ac has been working fine ever since and the horn also works. But the 10% of the time that it doesn't work is miserable. I've suddenly had this problem as well, ac blowing intermittent cold then warm humid air. My 2007 CRV has been having some issues with its AC. This has only been happening since last week of July 2010. It starts off blowing cold air and eventually warms up and doesn’t work. Turning off the dual feature, the problem still persisted. The pressure was fine. Sometimes the AC works fine the entire journey and other times the AC seems to just switch off by itself. Sometimes people think it's not blowing cold air when it is, and it is just that it is hot outside. Cold Air Blows Intermittently. Or worse yet, you come out to start the car one day, turn on the AC and it's blowing barely cold air when it was fine just yesterday. In short, the problem isnt with the AC, its with the car coolant system. Forum Rules. This was the exact problem which i faced in my Skoda. The blower passes air over it and voila, hot air. Another way to determine why you are faced with a problem of car air conditioner blowing hot air is to see when the unit blows warm air. While I wait on advice regarding my hard starting problem something new just developed today. We put Freon in it and it helped for a few months, the winter came & went. Any time you lose refrigerant from your car's AC system, that leak allows air and moisture to enter. And for the record the pic you posted you are still in the normal operating. only blows cool when car is in motion. Check to see if the cooling fans on your radiator are running. When I drive off, it starts cooling. I had a problem kind of like this. A simple tune up, performed regularly, can improve the unit's lifetime considerably. It would be helpful if you could find a pattern to when this occurs. Below are the top 5 symptoms of a bad car AC expansion valve: Warm Air - The most recognizable symptom of a bad AC expansion valve is when you turn on your air conditioner and warm air starts blowing out of the vents. Ever since then though, the central air conditioner blows cold only intermittently. No, not those seals down by the pier. And lastly are you talking about the ac fan blower or do you still have good blower its just blowing hot air? #6. & the AutoZone guy was being nice and helped me add it. I don't remember this ever happening before and it is very noticeable. This problem has to do with your air conditioning system itself. If you are sitting still put the truck in neutral or park and rev the engine to 1500-2000 rpm. of the car. When the car is blowing NOT blowing cold air but the A/C button is pushed in and the car is set to MAX COOL, I've opened the hood and looked underneath. There are basically three sections to the AC system; the sensors (high and low pressure sensors and the AC on/off switch), the command unit (the powertrain control module- PCM), and the "doing" components (the compressor. Although it would appear that the AC functioned better over time, it's not. It appears that if I let the engine cool down enough, then it will blow cold for a minute, then hot. Sometimes referred to as the PCB, this is an electronic control board that operates the fan motor and compressor circuits using relays mounted on the circuit board. Getting to the root of the problem can take some time and effort, but we have simplified the process by providing you with the most common A/C problems along with how to resolve these problems once they’re discovered. Diagnosing the reason that your air conditioning isn’t working will help you determine whether the problem is one that you can fix yourself or if you need to take it to a repair shop. The blower passes air over it and voila, hot air. The air would blow very cold for a few minutes, Then it would blow regular non-cooled air. In many of these articles we focused on some of the worst AC problems an old car can have. We haven't been able to pin it down to a particular driving behavior - it happens in local driving, highway driving, Max (re-circ) A/C, fresh air A/C. The dealer informed the contact there was a recall for the failure, but the vehicle was not included. The fans on my car have two speeds. This heater core then passes the hot air it generates into the vehicle with a blower fan. I just went under the hood and found something no one has mentioned. This whole summer, the A/C is intermittently blowing warm air for anywhere from 5-30 minutes. What is going on? As it turns out "intermittent" air conditioning problems can be one of the toughest items to diagnose. In other words, one day your car's A/C is blowing cold air, the next day it's warm air. Frozen units cause other problems too, which are often called in as individual problems before they notice the unit is not blowing cool air. of the car. I was looking under the hood at the AC compressor at idle. I lived in Texas and my AC started intermittently not working in October of 2008. It was blowing warm but I left it on. If I make it 82 degrees, it will blow cold air it seems. DETAILS: - Make/Model: Honda/Civic - Engine: 1. I been having problems with my car's air conditioning. Water should be hot going in and warm coming out just like. You should feel cold air blowing out of the vents into the car. Turning off the dual feature, the problem still persisted. I'm sure the problem is within one of the ambient temp sensors or even the sunlight sensor but there are no codes stored for it. I happened to look at my temp gauge and it was pegged. The contact stated the air conditioner in the vehicle is blowing warm air. Evacuating the system with a vacuum pump will purge it of unwanted air and moisture. Hello, I got my AC checked out due to blowing hot air and two auto repair shops told me the ac compressor was bad. If your heater starts by throwing warm air out of your registers, but you are soon left with a heater blowing cold air, then I would suspect that your flame sensor needs to be cleaned. "ON" means the fan is always blowing air through your vents, even when your system isn't working to cool the air it blows. No, not those seals down by the pier. *UPDATE* 6/12/2013 -----Went back to Honda yesterday when the AC was actively NOT working. If you live in an area where it's warm all year round you may grow tired of having to change your part regularly. Last year, it would blow hot intermittently; now, it only blows cold for a minute or two after I start the cold engine, and blows hot the rest of the day while I keep driving around. Hope this guideline on how to fix car ac blowing hot air helped you out to get done with the issue of car ac blowing warm air intermittently. Car heaters that blow cold air. Best Car Batteries For Hot Weather - Top 5 Picks! Hot temperatures are one culprit that can sap your battery's life. Ive presently got a 2008 Honda Civic 1. If we turned the AC off for a few minutes it would again blow ice cubes out of the vents for a few minutes. In other words, one day your car's A/C is blowing cold air, the next day it's warm air. Air from some vents and not other vents sounds more like a damper/door issue in the duct work. If the fan's not blowing, air won't be flowing very well. We haven't been able to pin it down to a particular driving behavior - it happens in local driving, highway driving, Max (re-circ) A/C, fresh air A/C. My car's A/C will blow cold air then after a while it will blow hot air them cold then then stay hot. the only difference in the air is the temperature of it. Air filter is clean. I have a 1994 530i BMW, and all of a sudden my AC does not seam to be running right. I shut it off and cranked it again and the car ran better AC came back on. The dealer said it was NOT icing up. I can live without warm air in summer, but problem still persists. A/c blowing cold air intermittently with warm air asked by Liam G on May 13, 2016 My car has around 158,000 miles. If your car's air conditioning system is blowing hot air, don't sweat it out. I went for a drive and it would come on and blow cold and then suddenly go back to blowing warm air, back and forth, at random. System evacuated and recharged, still exactly the same. Turning off the dual feature, the problem still persisted. We have a lot of car air conditioning articles posted on the site that aim at getting your mobile cooling unit working again. I thought our a/c problems were fixed but that was fleeting. Fixing car air conditioning that dies after a few minutes on hot days How to Diagnose and Adjust an A/C Compressor Clutch in Car Truck - Blows Cold Then Warm AC Aircon Air Conditioning. Water should be hot going in and warm coming out just like. The contact stated the air conditioner in the vehicle is blowing warm air. They replaced the compressor again, but we are still experiencing the same problem. Listen to Tom here. This may be due to a faulty heater blower. We had a pretty warm day and I decided to try out the air conditioning. So in summary, the compressor comes on and blows cold until it gets hot outside. After stopping the car for a while, that will fix the problem temporarily, but after 5-15 minutes or so the a/c will only blow warm air again. , Ford and Lincoln, 18 replies. I decided to turn off the AC and turn it back on in a few minutes, and that cleared the problem up. the exact same a/c problems started up again - intermittent cold air / hot air when a/c is on. Sometimes the unit isn't actually damaged, and resetting your climate control unit will allow your air conditioner to work as it did before. (Page 1 of 2). The dealerships going to charge me 130$ just for the diagnostic. I could then switch the selector back to the AC position and I would still get cold air. This has only been happening since last week of July 2010. So i recharged it, it does blow cold air, BUT, only when the car in in motion. This problem is noticed on many car models. If you own a Chevy Colorado and your condenser is good, watch this video to learn a fix that may get your AC working again. Air filter is clean. Driving around on a hot day in a car without a working air conditioner can be uncomfortable and even dangerous in extreme heat. A few weeks after that the ac would intermittently start blowing warm air. The car warms up and you get sort of warm air but if you put the fan higher it starts blowing colder all this time it stays in the middle between hot and cold. No rhyme or reason to it. Toyota Camry a/c blowing hot air, Toyota, Lexus, and Scion, 16 replies how long before heater blowing hot air?, Automotive, 39 replies Heater blowing cold air, Automotive, 12 replies New car- vents blowing warm air when idling/driving slowly, Automotive, 13 replies problems w my ac/heater on my 2004 maxima, Nissan and Infiniti, 0 replies. The 2016 Hyundai Tucson has 28 problems reported for a/c intermittently blows warm air. The fan/blower works perfect. and when it blows. I've recently having an intermittent problem with my air conditioning not working. Yet the problems that can cause an auto AC to perform in such a way tend to be the same problems. Now, for the feeling of warm air at idle, if your car has a sight glass on the receiver/ dryer assembly or the small AC hose. I decided to turn off the AC and turn it back on in a few minutes, and that cleared the problem up. After stopping the car for a while, that will fix the problem temporarily, but after 5-15 minutes or so the a/c will only blow warm air again. The problem is that it comes back on after a few days of driving. the exact same a/c problems started up again - intermittent cold air / hot air when a/c is on. I show in this video what was causing the problem and how I fixed it on my 2005 Hyundai Santa Fe. So in summary, the compressor comes on and blows cold until it gets hot outside. It started warming up again so I had it looked at & was told I had a leak in one of the a/c. Air Conditioner Blowing Warm or Hot Air Intermittently We took car to dealer and we hope they solved the stalling, but for some reason they didn't get around to looking at AC. Hello, I got my AC checked out due to blowing hot air and two auto repair shops told me the ac compressor was bad. So, something is causing the compressor to not run when it > should. I’m tempted to take it to someone but don’t want to fork over 1k or more for something I could just be forgetting that I could fix. When it goes off like this. If the fan’s not blowing, air won’t be flowing very well. The entire way down it didn't blow any cold air. then that's one reason why hot. When I drive it a few miles up the road, it blows hot air. After about 5 minutes, I noticed that my A/C A/C stops blowing cold air when Ideling and really hot outside. A/C will blow cold, then suddenly blow hotwhere do I look to fix this problem? 6 Answers. It blows HOT with all buttons. A few weeks after that the ac would intermittently start blowing warm air. DETAILS: - Make/Model: Honda/Civic - Engine: 1. Starting not too long ago the AC will work intermittently. If you notice that it initially vents out cold air, but over the drive goes to warmer air, then the problem is likely a frozen expansion pipe. I say it switches off because for one it blows hot/outside temp air and for another the different smell of fan blow air as opposed air-conditioned air smell. I have a 2002 Ford Taurus that I bought used to get my husband to and from cancer treatment so 140 miles 2 times a week. Now it doesn't come on at all the blower and ac. The car always blew cold before about 45k. Tl- the contact owns a 2005 Dodge Grand Caravan. When an air conditioner begins to fail, the most common thought is that the AC needs a refrigerant recharge. Probably like 85* or so. I see these problems most often every summer in our 27 year old HVAC business. Car air conditioner working intermittently? For the past YEAR my cars a/c works intermittently, I have any theories: when it's hot, the ac blows out room temp air and 10-20min later ac will kick on, when it's cold out ac works fine, when it's not working and I hit a bump in the road it works again. Three weeks later, its back to cold. 19000 mi: Right side air conditioner blows HOT all the time. , Ford and Lincoln, 18 replies. Sometimes it will be blowing nice and cool and then decide it would much prefer to blow warm air. Car gets very hot with AC on - intermittent I had to get some parts for the car for another issue at the junkyard - about 30 miles away. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. This may be due to a faulty heater blower. This is a discussion on AC blowing warn air intermittently within the Mustang GT350 General Discussions forums, part of the Mustang GT350 Forum category; I was driving home last week and the AC has started to blow warm air sometimes then it gets cold again. The low-side coolant pipe is warm (hot even) and the condensor fan is OFF. At first I thought a loose connection, but after investigation nothing found. Cartalk) submitted 5 years ago by ConceptualTrap AC will work for about 5 minutes then start blowing room temp air. Average failure mileage is 7,900 miles. However, if I turn the AC off, and then back on, the passenger side no longer blows cold. Going send a not to FCA and see if I can get a response. if so, you'll need a new condenser. Depending on what's causing your air conditioning's problem, you might notice different signs like a lack of refrigerant or a funky smell. Another way to determine why you are faced with a problem of car air conditioner blowing hot air is to see when the unit blows warm air. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. Well the weather is warmer now, so i tried, was told to recharge it because it didnt blow cold air. : Ever notice on all cars there is a temperature setting? What this does is control the on time for the AC compressor and also the flow of hot engine coolant into the heater core located in the dash. The odd thing is, sometimes it works perfectly, so that rules out a lot of possibilities. Car heaters that blow cold air. It started with intermittent hissing coming from the dash. Any time you lose refrigerant from your car's AC system, that leak allows air and moisture to enter. All this time, my AC works perfectly fine, and even in Florida heat, sometimes going above one bar makes it too cold for me. I turn on my A/C all the way to LO with the fan speed about in the middle and after a few seconds I quickly realized my A/C was blowing warm air, not even the least bit cool What could cause that? P. Car Air-conditioning Compressor. Several other issues can also cause an AC not to blow cold air as well, including a bad solenoid, bad fuses or vacuum leaks. It will draw more air across the radiator and cool it down. Your air conditioning system pulls air in from the atmosphere or recirculates the air in your car’s cabin. After going a few morw miles in town I tried the AC again. Why Would Fordf350 Truck Air Conditioning Blow Warm/hot Air Intermittently When the airconditioner is on sometimes it works just fine blowing cold air but more times than not, it will go to blowing warm to hot air through. Everybody thinks it's easy to do A/C work but when it only works for a short time, it's an indication that they did not know what they were doing and misdiagnosed the repair. If your A/C in your car turns on but isn't blowing any cold air, you might have one of a few problems. Evaporation Expansion Valve Jserrano, Ive been reading all your AC posts and I think my problem with my air conditioner is the Evaporator Expansion valve, from what the AC tech told me its located on the evaporator, can you point out in this picture where that would be located if you can, I was just reading today about this I have my hayes manual in the car, im at work so when I get home im. To many homeowners' surprise, air conditioners can actually freeze. Diagnosing the reason that your air conditioning isn't working will help you determine whether the problem is one that you can fix yourself or if you need to take it to a repair shop. The a/c takes a while to start cooling off and will get cool if you are at 55 or higher but if you are in bumper to bumper or come to a stop it starts blowing ambient air from outside. Also, when it starts blowing hot, stopping the compressor by shutting off the AC button will allow the condensor to warm up, melting the ice. A/c blowing cold air intermittently with warm air asked by Liam G on May 13, 2016 My car has around 158,000 miles. I have put guages on it and the system is full, but I have noticed that the low side is at 50 and high side is at 180. In this video you will learn how to check the compressor, the pressure in the system, and how to add refrigerant if it's low. We took it back to the shop and they noted that the compressor was shutting off for some reason. If it's not dripping at all then it might be that the condenser is freezing up. This continued for some time slowly requiring more time on the defrost setting. This happens intermitently. When the A/C starts blowing warm, turn the ac OFF then ON, observe the VOLT reading. AC Intermittently Working. Although it would appear that the AC functioned better over time, it's not. My 2004 Camry AC has started blowing warm air. At some point it always shuts itself off and may/may not come back on until it feels like it. Just found a thread on auto ac units that suggested the cause is a plugged up radiator with dirt, bugs, etc. Check to see if the cooling fans on your radiator are running. For me, it gets too hot after awhile in the car. Three weeks later, its back to cold. Some new car owners,think this is a heater core issue. The days are getting hotter. I could then switch the selector back to the AC position and I would still get cold air. Why Would Fordf350 Truck Air Conditioning Blow Warm/hot Air Intermittently When the airconditioner is on sometimes it works just fine blowing cold air but more times than not, it will go to blowing warm to hot air through. The 2016 Hyundai Tucson has 28 problems reported for a/c intermittently blows warm air. The blower always runs, it's just the air isn't cold at times (when the clutch isn't engaged obviously). I've suddenly had this problem as well, ac blowing intermittent cold then warm humid air. I can fiddle with the controls, and it will usually go back to blowing cold, but sometimes it won't until it's been shut off for. Core case seals, blower house seals or evaporator core case seals; All can open up and diminish air flow. I get a lot of questions about car air conditioning systems not blowing cold enough. The AC light is not flashing. 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. Any ideas? I also do see the condensation on the ground under jeep if that matters. Also cars use flaps to regulate air mix from heater core (it is in your dash somewhere) to achieve correct temperature. The dealer informed the contact there was a recall for the failure, but the vehicle was not included. AC started to blow HOT air when the. Ive presently got a 2008 Honda Civic 1. During the day I could sometimes get it to work when I was stopped at stop lights by turning off the A/C and back on several times but then when I would start driving it would start blowing ambient air again. you may also need a new drier, depending on how contaminated the system got from running with the leak. the exact same a/c problems started up again - intermittent cold air / hot air when a/c is on. It just started last year, blowing warm air when idle. So you went for a road trip or a long drive, and after 30 minutes of driving realized that your AC suddenly stopped working or switched to blowing warm air. In other words, one day your car's A/C is blowing cold air, the next day it's warm air. So I guess we'll see if the problem returns. Everybody thinks it's easy to do A/C work but when it only works for a short time, it's an indication that they did not know what they were doing and misdiagnosed the repair. This time we get to share some good news. 7L 4x4, 88K Miles. The A/C on my 2009 Honda CRV faile intermittently. It was blowing warm but I left it on. This happens intermitently. Toyota Camry a/c blowing hot air, Toyota, Lexus, and Scion, 16 replies how long before heater blowing hot air?, Automotive, 39 replies Heater blowing cold air, Automotive, 12 replies New car- vents blowing warm air when idling/driving slowly, Automotive, 13 replies problems w my ac/heater on my 2004 maxima, Nissan and Infiniti, 0 replies. Car heaters that don't blow at all. I considered installing it myself, but given that I have to take it to a shop to have the refrigerant recovered anywaysin the end, I'd only be saving myself something like $75. I have a 2004 Z71 with dual climate control. Frozen AC Unit. I've had my car for less than 6 years in a 4. The air conditioning of my S80 Volvo car works right for the fisrt hour or so, then the air ceases to flow inside the car, so no more air conditioning. As the weather started to warm up this spring we noticed it is having some sort of AC issue. Several other issues can also cause an AC not to blow cold air as well, including a bad solenoid, bad fuses or vacuum leaks. When the hissing stopped, air was cold. My 1994 honda accord ex blows hot air, no A/C? I heard that newer cars (not sure how new) don't use freon but use something different? # 2 ( permalink ). DETAILS: - Make/Model: Honda/Civic - Engine: 1. At first I thought I was losing my mind, but after a hot hot weekend in Dallas shuttling friends from the Midwest around to & from a wedding I decided it was a real issue. I get a lot of questions about car air conditioning systems not blowing cold enough. Toyota Camry a/c blowing hot air, Toyota, Lexus, and Scion, 16 replies how long before heater blowing hot air?, Automotive, 39 replies Heater blowing cold air, Automotive, 12 replies New car- vents blowing warm air when idling/driving slowly, Automotive, 13 replies problems w my ac/heater on my 2004 maxima, Nissan and Infiniti, 0 replies. that prevents the ac from reaching the back vents. AC issue is only blows cold when car moving. AC compressor always engages. Fortunately, there are things that you can do if your air conditioner is not blowing cold air. When it goes off like this. Its just really hot (which is normal). Here in south Louisiana it gets quite hot and it's miserable. Both times, I would turn on the AC and it would blow. Depending on what's causing your air conditioning's problem, you might notice different signs like a lack of refrigerant or a funky smell. Simple Tip to Improve a Car's Air Conditioning Performance. Any number of culprits could be causing your car A/C to blow cold then warm air, including:. Feeling a bit frustrated? We know the feeling. It seems like it usually doesn't want to work when its real hot outside (over 105), but this is just an observation that could be all by chance. The A/C on my '01 325xi wagon is acting up. Start by checking the coolant level when the engine is totally cold, and fill it if it's low. Yes, freeze solid inside into a block of ice. Soemtines it blows cold ario and other times it does not. I went for a drive and it would come on and blow cold and then suddenly go back to blowing warm air, back and forth, at random. Figure out what’s wrong with your car’s A/C and fix the problem yourself, all for less than the diagnosis alone would cost at most auto repair shops. How to Fix Intermittent A/C in a Volvo (P1/All) As we approach the summer months, air conditioner use becomes a daily ritual; discovering that the AC functions intermittently could be devastating. What’s wrong with your car?. 2003 Forester Weird AC problem My Forester blows cold air just fine while idling in the driveway or waiting in line at the drive through window. Recently when running the AC, it will randomly begin blowing hot air instead of cold. Started a year ago in Las Vegas when temp was 115. I used to manage a radiator shop and worked on ac and heaters. AC is intermittently blowing warm air. AC blows hot air during the day, but cold air at night; You hear a hissing or bubbling noise near AC (this means the leak is significant) Solution: If you see these signs, you need to schedule an air conditioner repair. Moisture in the AC system can also cause an AC blows cold then warm condition. Driving around on a hot day in a car without a working air conditioner can be uncomfortable and even dangerous in extreme heat.