My a/c has been blowing hot air for three day, i replaced the thermostate, and hoses and cleaned out the entire system. If your compressor isn’t cycling on then your AC fans won’t kick on either. AC systems can be a mystery, especially when it comes to electrical issues like it sounds like you’re having. So i added a freon leak detector and did not notice any leaks. The seal to my sun roof was broken for about a month before I got around to replacing it. What is wrong when the car blows cold air instead of hot and the car temp keeps climbing up and down. Thank you for asking about your Hyundai Santa Fe. Our first question would be how you added the new refrigerant. so this time we used a stop leak, which indicated to immediately add refrigerant, which i did. Unfortunately you need a set of mechanics AC gauges to determine what the problem is from here. After putting that in and checking it again its still blowing hot air. Feel free to contact our technical support line at 888-863-0426 with any other questions. It blows like normal just not cold. My A/C blows cold during cloudy days or at night or early mornings. Recently it started to blown hot air, so i got my thermostat replaced thinking that it was that. We recommend adding the Red Angel A/C Stop Leak and then having the A/C system fully recharged to the proper level. No leak detected and the ac worked fine for the next 3-4 months. When weather cools the air blows fine! my 2002 nissan altima blows hot air when a/c on ! I have a 2007 Nissan Altima 2 months ago I had a new radiator put in my ac has not worked since but it was working before . Depending what year Elantra you have, the door is most likely controlled by an electrical actuator. Look under the dash while moving the temp from hot to cold, you should be able to see the blend door move. Make sure both of the connections are in good shape and not damaged or bent. It sounds like you have a problem with your HVAC system rather than your air conditioning system. The first thing we would recommend is to check and see if your car is still under a manufacturer’s warranty. Is there any chance that I could have a bad high pressure switch? Thanks for your question about your 2000 Impala! I don’t want to take it to the dealer if I don’t have to. You may also consider checking your electric fans for proper operation. If the fans are not properly installed and sealed against the radiator they won’t draw enough air over the condenser to keep your AC system functioning properly. What else could it be? It won’t blow anywhere else. If all of the pressures are in the acceptable range, then this could also be due to a malfunctioning pressure or temperature switch in your system. The compressor pressurizes the refrigerant and sends it to the condenser, which then cools the refrigerant. In this part, we’ll learn, To clean the condenser coil, you’ll need a water. Your problem could also be a clog in your system or an overfilled system. It will occasionally cycle off while driving, but never really gets cold. new cooling rod The problem could be coming from a few different places. The only way to know if you’ve got the right amount of refrigerant is to have the system evacuated and the refrigerant weighed. Try having that engine coolant temperature sensor replaced first and see if that solves your AC problem. Unfortunately, it sounds like you may be losing it a little too quickly for the Red Angel A/C Stop Leak to be affective. If the low pressure is too low, then you need more Freon. replaced with new compressor – no go I have a Honda Civic 2008. You can fiddle with the A/C knobs, switch from Max A/C to defrost and nothing happens. Thank you for your question about your ’05 Ford Freestyle. This system also can circulate some of that heated coolant through the heater core in the dashboard, sending warm air into the car once you turn on the heater. If you do simply have a leak, you can use BlueDevil Red Angel AC Stop Leak (available here: http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) to seal the leak. thank you. read all comments and your reply’s. Hello, If you cannot see the puncture, consider adding UV dye to your air conditioning system to identify the puncture point, or simply add Red Angel. Please help! For your air conditioning, since the light is not even coming on when you press the air conditioning button it sounds like that is a separate problem. Depending on what kind of car you have it is possible that your compressor is ok and that is the standard cycle time. It sounds like you have a refrigerant leak and that is why the recharge isn’t holding for you. You may be able to replace the blend door actuator yourself. When I actually start driving it goes completely hot. Feel free to contact our tech support team at 888-863-0426 with any questions. Any advice on a fix would be great! They A/C has not worked since the beginning of summer last year. Based on the noise you heard and the smell, our best guess would be there is an electrical short in your compressor. About a month later I had the radiator replaced. I own a 2008 ford fusion. This typically happens if the engine is too hot, so be sure to check the engine temperature. this could be caused by debris blocking the condenser or a failed cooling fan or cooling fan relay. Takes 10 to 15 minutes before cold air slowly starts to come out but not as cold as it used to be. If you find a low coolant level, add BlueDevil Radiator and Block Sealer (available here: http://store.gobdp.com/radiator-block-sealer-00205/) to seal your leak, then top off your cooling system with Honda’s recommended coolant for your car. Thanks for your question about your 2008 Honda Odyssey. The car still does not blow cold air and it still has a problem that when the a/c is on the fan turns on for a couple seconds then turns off. Got car issues? i have hyundai ELANTRA it is blowing hot air… I tried adding refrigerant with no success. Based on your description, it would be worth it to try using the Red Angel A/C Refrigerant Stop Leak. I have a 2008 Chrysler 300. I have a 1996 toyota camry. If you have a set, you can test the pressure rise across the compressor. Hi, My Mazda Tribute 2003’s A/C cools sometimes when its running or idle while its on low, when running on high and driving it stops cooling, while whenever I turn the A/C on I can hear the fan make a very loud noise until I turn it off and it turns off as well. Please advise. My ac stops cooling whenthe ccar’s temperature reaches half and beyond. I have 08 Honda accord. I have a 2004 Chevy Tahoe that is blowing out hot air. The AC works great most of the time, but about once or twice a week without any notice, it will start blowing hot air. I have a 2000 dodge venture van. My ac works great on cool days (60-75 degrees) but only works for 15 minutes on really hot days. If it turns out that the refrigerant level is full then you may want to have an A/C specialist take a look at the vehicle for proper diagnosis. Anyway, my issue is that in the mornings lately, the ac does not work. i opened the front. If you are hearing a grinding noise associated with turning on your AC, then there is some internal damage to your compressor and even if it had the proper amount of Freon, it wouldn’t be able to do its job. Thanks for your question about your Subaru Forester. -BD Auto Pro. I have a 2003 Toyota Highlander, the climate control is faulty but i also noticed when i refill the ac refrigerant, it leaks and does not stay beyond 3months. Over time, the AC cycles the air and turns it into a cool one. Aside from the clutch not engaging when it’s hot, what would I need to do to get the air running colder, compressor failure or re-charge the refrigerant and add a new dryer ? Make sure once you press the AC button you hear the fans come on to cool things down. If you can feel the door binding or moving too easily it may be broken and you may need to replace it. If you cannot see the puncture, consider adding UV dye to your air conditioning system to identify the puncture point, or simply add Red Angel Air Conditioning Stop Leak to your air conditioning system to quickly and permanently seal the leak. I have a 08 Honda Civic and the AC goes on cold for about. There are 4 AC vents on my dash board. Thanks for your question about your 2005 Civic! Cracked block or leaking radiator? Most of the time your evaporator is freezing up due to a clogged water drain line or a clogged cabin air filter. One or both of them should come on when you turn your air conditioning on. It would blow hot air and not get cool. There are a series of doors and flaps controlled by servo motors in your ventilation system that direct the air where to go, including the blend door which directs the air of your cooling coils or heater core. Is it normal for fresh oil to be on the pressure relieve valve? Thanks for your question about your Altima. I was curious, so I hit the a/c button to turn it off, waited a few minutes, then turned it back on. If it is dirty, chances are high that you’ve got debris in your system causing the poor air flow. If the fan isn’t the problem then the best way to diagnose the system would be to hook it up to a set of gauges to see what the system pressures do when the warm air starts to blow. With your A/c blowing that hot all the time, it sounds like your problem may actually be with your ventilation system, not your air conditioning. Thank you for asking about your Nissan Serena. suddenly it started to blow hot air through AC grills. So… Based on your description, you may have a failing expansion valve. Hi I have a 2005 scion and I tried to recharge the air and it sounds like it comes back out I put some dye in ti to see if I could see where it is coming from I didn’t see anything would this stop leak help? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations. I have a 2006 cheverlot equinox when I turn the ac on you can hear the compressor kick on than turn right off,than it just blows out warm air. Is cold while driving but when I parked, the a/c is hot. Hi so i had a question… a week ago my car was making an ugly noise well come to find out the belt popped because the compressor locked up. You may want to have it checked by an A/C specialist. your thoughts? The A/C was working fine, then all of the sudden it started blowing out warm air. Thanks so much in advance. Thanks for your question about your air conditioning. Thanks. Blend Air Door Actuators, also known as HVAC actuators, are responsible for controlling the position of air vents and mixing hot and cold air to achieve the optimum temperature. If your low side pressure is too high your system may be over filled. The amount of hot air and which direction it blows are controlled by the buttons and switches on your dash, which direct the … Its air conditioner was fine. We checked the actuator under the dash and it’s working properly . If it’s where it’s supposed to be, proceed to step 2. The second thing that seems odd is your air only blowing from certain vents and the heat working intermittently. Did I do something incorrectly? Thanks for your question about your 2004 Lancer. It’s not the compressor too becauase it spins when I turn on the AC. Sounds like you can help us figure out what our problem is. The other possibility is that you are just slightly low on refrigerant. The mechanic is going to charge me 200 to installed the new one that’s was sent to me but I don’t have that kind of money to keep fishing out. I have a 2006 Ford E-350 Econoline Passenger van with A/C issues. This alone may alleviate the problem and get your Hyundai back to its normal working condition. The only way to tell if you have a bad AC compressor is to use a set of AC gauges to measure the pressure right before and right after the compressor. The fan began to come on after that but only on position 5. It is no particular time it does this. The temperature gauge stays all the way up to “H”. Your system has a high pressure shut off safety switch that will shut down your compressor to keep the system safe and from damaging the compressor. usually after a day or 2 of doing this the air will work up to a month and begin the process over again. We recommend adding a can of the Red Angel A/C Stop Leak (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) and then recharging your system with the proper amount of Freon. With the summer coming up quick I want to try and get it fixed ASAP. If you’re done with step 4, the debris and dust that are large and loose should be wiped away. Have tried to add freon but it will not take any and it says it is full too. It will be blowing normal warm air while driving and then all of a sudden start blowing cold. We recommend taking the vehicle to a second shop for a second opinion. hi iam having Hyundai elantra 2006 crdi model from last week ( after summer starts ) iam facing probelm with Cooling when iam staning in the traffic but its is k when moving…. If that is not the case then it may simply mean you have a freon/refrigerant leak. The problem you are describing sounds like a problem with your dual climate control unit. Based on your system being over pressurized that is most likely your problem. When I connected the gauge to the low side port (with engine running, a/c on High, coldest setting) the needle points to “FULL” showing 50 psi static pressure. My 2011 Kia Forte Koup recently started blowing mildly cool air that only lasts a couple minutes before turning warmer. Your new radiator and warm AC may be related. Tom, Based on your description, it is possible that an electrical issue is the culprit behind this mystery. We recommend applying Red Angel A/C Stop Leak and Conditioner (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/). You can check for both of these problems by measuring the high side pressure in your system. Also, another time I was driving I heard 2 noises as if pressure was being released (like a “pffffft pffffft”). In that instance we recommend adding 1 can of Red Angel A/C Stop Leak (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) and then following it up with the proper amount of R-134a to fill the system. If you’re sure everything is fine, then the pressures in your system are too high and it may be over filled. Usually when you get different temperature air from different sides of your car the problem is with your dual climate control system. If the module is good, then you may have to start tracing the wires and connectors in between the module and the relay looking for a bad connection or broken wire. Thanks for your question about your 2001 Corolla. I’m not sure what to check next. It is possible that a bad control unit is also causing your AC to not work but if that were the case, the AC lines should still get cold even if you don’t get cool air from your vents. I do not have a dual control. If everything works fine when it does work, it most likely isn’t a mechanical problem or a problem with the refrigerant, the problem is the system isn’t getting the signal to turn on until you go over a bump and it jostles things into place. Thank you for asking about your Pontiac Grand Am. I have a 2007 Hyundai Santa Fe, the air-con started making an intermittent oscillating noise when running. I went to get a inspection the mechanic told me the compressor had a leak and a new one is needed, I would like a second opinion on that please. BUT IT ONLY BLOWS COOL AIR EARLY N THE MORNING AND AT NIGHT WHEN ITS NOT HOT OUT OR THE SUN NOT SHINING. No oil was found on the plastic parts under the compressor, however a drop of oil had appeared on the pressure releive valve when i touched it. Sometimes it doesn’t get cold for days. If the pressure is too high then your system is probably overfilled. since my ac is blowing cold air when on idle i don’t think its a low freon issue right? 2) Thermostat that is stuck open. What is the problem If this actuator has failed it may be causing the problem you’re having. What’s the likelihood that it’s the heater core, or is it something else? If the expansion valve was failing, the low side pressure would be too high and the high side pressure would be too low. Can I put new line on and fill with freon and it will work or should I replace the pump also? My air worked for a minute and then went out again. Now, the situation is, I dont get cold air till I run for atleast 20 mins of time. If the noise you heard was an external blowout, you would have noticed AC oil spots all around the area where the blowout occurred. Make sure to enough airflow at the place where you’re drying it off. Hello, ), so the temperature actuators generally fail first. While running, the AC is blowing cool but if idle, after about 15mins., it start to blow hot air.I checked the condenser fan and it’s not turning. Then I switched on AC still it was giving hot air. Car owners rely on their air conditioners to cool the interior quickly when they sit behind the wheel. Today this is not the case. Thanks for your question about your Nissan Sentra. Thanks for your question about your truck. Could the replacement of the radiator have drained the Freon or should I be worried about another bigger problem? The air stopped cooling as soon as the refrigerant can came off and 3 days later I looked for a leak with a UV light. It may act up due to the climate control being faulty but it should not be losing refrigerant from that alone. With the car off and cool, find the wires coming from the fans and trace them back to a plug in connector. This should stop the leak and prevent any future issues with your A/C. What do you suggest. You would have to measure your system’s high side pressure to help you figure out if that is a problem. 2001 VW GTI 2.8 12v VR6 blowing hot air.. there was a knocking noise every time i turned my AC on for a few days.. then it quit and the AC broke. Air condition is blowing hot air now. It could just be a coincidence because not every bump will do the trick. Your system has a high pressure safety feature that will shut off the compressor if the pressures get to high in your system. The replacement of the radiator really would not have any effect on the A/C system at all. We have successfully used the product in the past to seal leaking heater cores. I have a 2003 Honda Accord. What do I need to do? Thanks for your question about the air conditioning in your Chevy Equinox. It’s definitely not a fan problem because the air is not cool even though I was driving at a high speed. Thank you for asking about your Toyota Camry. It sounds like you’ve got a leak in your system allowing the refrigerant to escape after you add it. If you do find a leak, add Red Angel AC Stop leak (available here: http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) along with new refrigerant to seal the leak and keep your air conditioning system cold. Thanks for any info. It happens at different times and doesn’t last long. If you’re confident and have the time to do that work, changing the burnt out servo motor or realigning the duct door is a relatively easy job. It is possible that your AC system relief valve is malfunctioning. Does this problem occur all the time? Hi, In the Toyota Corolla, is the Blend door actuator the same as the servo? The most likely possibility is that your system is experiencing an overly high pressure and shutting off the compressor to keep anything from being damaged. Unfortunately you need a high pressure AC gauge to measure the high pressure side of the system at each component to check for clogs. 2007 ford mustang. Thanks again for your question! It sounds like your husband did a great job in fixing the problem. By reading many of the other posted questions I think my 08 Lincoln MKX (56h500 mi only) may have an issue with the condenser fan. Since you’ve changed everything else, it sounds like there is a short in the wiring either from the wiring harness to the switch, or from the switch to the resistor. Some of the most common causes are a bad fan clutch, or a clog somewhere in the cooling passages due to old antifreeze or other buildup in the system that can happen with age. Feels plenty cold enough, it’s just frustrating that it doesn’t work for the first 10-15 minutes of driving. Bought a refill with gauge to put new freon in. It only blows out the temperature that it is outside. The a/c will only blow cold for 5 mins at a time and then blow hot air. I use a Honda Accord 2003. This door is operated by your ventilation controls and moved by a small servo. Thanks. Stuck thermostat. A couple weeks ago, my sister noticed that my temperature gauge would move above the half-way mark then go back down. If you have a leak, the low pressure in the system would keep the compressor from turning on the protect it. But whenever it is very sunny it doesn’t cool at all, or rather the coolness doesn’t circulate in the car. I have no idea what this means and makes my head hurt thinking about it. What could be the problem i need some advice !! Your email address will not be published. If both of those lines are hot then you are correct in that your expansion valve is not properly reducing the pressure and cooling the refrigerant in your system. Why is the Heater Blowing Cold Air Instead of Hot? Thank you for asking about your Nissan Rogue. 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