Why is My Car Air Conditioning Not Blowing?


air conditioning not blowingNo matter what time of year it is, you expect the air conditioning system in your car to be working properly. It could be an unexpectedly warm fall day or an overly wet and humid day where you just want to dry out your car or defog your windshield. Either way, when you find your air conditioner not blowing air or not turning on, it can be extremely frustrating.

Fortunately, your air conditioner not blowing is a common problem and a relatively easy fix without having to bring your car to the repair shop. If you are actually getting no air from the ventilation system in your car, you might not have a problem with your air conditioning system at all! If you’re getting air to blow but it’s not getting cold, that’s a different problem but hopefully still an easy fix.

Car AC Not Blowing or Is Your Car AC Fan Not Working?

If your car’s AC isn’t blowing air, it could be a problem with your car’s fan. Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver’s selection in their climate control system. These different speeds are usually controlled through a set of resistors or a small computer module which is controlled by the fan switch. The blower motor resistor or blower module gets hot as it powers the fan so, often times, they can burn out causing certain speeds of the fan in your car to stop working, the fan can be stuck on one speed, only work on high speed, or not work on any settings. Since these resistors get hot, many car manufacturers will install them into the ventilation ducts of your car to keep them cool. Changing them can be as easy as removing two screws and one electrical connection and installing a new set of resistors or a new module which are available at your local parts store. Although each vehicle is a little bit different, these systems are often very similar so this instructional article may be helpful. Another reason why your car AC fan is not working could be due to your cabin air filter. Cabin air filters serve as a filter to the outside air coming into your car to make sure it is clean and not filled with contaminants. However, if this air filter isn’t changed, it can become clogged which can prevent full force air circulation through your car’s ventilation system.

Why Is My AC Blower Not Blowing Cold Air?

The second problem you may have on a hot day is having your ventilation system continue to only blow warm air or hot air even when the air conditioner is turned on. This problem has to do with your air conditioning system itself. Your air conditioning system uses a refrigerant, a compressor, an expansion valve and two heat exchangers to manage air flow and cool the air inside the cabin of your vehicle. Therefore, it is possible that your car is low on refrigerant that is preventing your air conditioning from working properly. This is the most common reason for why your car’s AC is not blowing cold air. For a more in-depth look at automotive air conditioning systems, read this How Stuff Works article!  With little or no use during a long winter, the air conditioning system may have problems when re-engaged.  Occasionally there could be problems with the compressor, but usually, the problem is a slow leak that has caused enough refrigerant to leak out causing your air conditioner to malfunction.

How To Fix a Leak in Your Car’s AC System

To fix your air conditioning system, you must first seal the leak and then replace the lost refrigerant.  Red Angel A/C Stop Leak and Conditioner can accomplish the most difficult part, sealing the leak, all in an easy to use aerosol can.  Red Angel A/C Stop Leak and Conditioner comes in an easy-to-use container with an attached coupler for the R-134a air conditioning system in your vehicle.  Red Angel A/C Stop Leak and Conditioner is a powerful leak stopping agent that will not harm or clog any of the components in your system and will remain inert in the system until it reaches the leak.  The temperature differential at the leak will activate the leak sealer in Red Angel, sealing the leak permanently.  Once the leak is sealed, you can add the correct amount of R-143a refrigerant to your cooling system getting your air conditioning back to working like normal.
Red Angel AC Stop Leak & Conditioner





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Pictures Provided By:

air_conditioning_now_blowing.jpg – By Humonia – Licensed By Getty Images – Original Link

BlueDevil Products can be found on Amazon.com or at AutoZone, Advance Auto Parts, O’Reilly Auto Parts, NAPA, and other major auto parts retailers.

61 responses to "Why is My Car Air Conditioning Not Blowing?"


  1. car air conditioning service on May 14, 2014 at 8:09 am

    I think we should go for proper mechanic for maintain & service our AC before summer. it is good practice which is beneficial for us. because AC is key tool for our car especially in summer. so if we don’t maintain it properly then ultimately it gives big cost for us.

    • Stacey on April 18, 2015 at 7:11 pm

      My ac starts out great. Fan speed adjusts, air is cold but then the fan just stops blowing. Front and back, all vents. If it sits for awhile there’s water underneath it like it froze up and thawed. Then it works again when I get in it for a few minutes. Today I made a sharp right turn and water actuall dribbled onto my gas pedal foot. Anyone help?

      • BlueDevil Pro on April 22, 2015 at 9:36 am


        Thanks for your question about your air conditioner! It is possible that your cooling coils are freezing up which will reduce the air flow through your vents. Once you turn off your air conditioner it will thaw and could allow cold water out into your air vents which could be what poured out onto your gas pedal.

        The most common cause of frozen cooling coils in your car is a dirty cabin air filter. They are usually very easy to change yourself. If you find your cabin air filter and it is dusty, dirty or filled with debris then that is mostly likely your problem. Most major auto parts stores carry a wide variety of cabin air filters for most vehicles and may even help you install it.

        Thank You!


  2. Stacey smyth on June 25, 2015 at 7:42 pm

    One day I was driving and heard this awful noise while air was on. it got louder then when it stopped so did the air.the air blows out cold but now it just don’t blow.I can touch the vents and feel cold air but it just won’t blow.it’s so hot for me and the kids any ideas what it could be

    • BlueDevil Pro on July 6, 2015 at 1:45 pm


      It sounds like your blower motor or fan is damaged. The noise you heard was probably the fan blades hitting the side of your ventilation ducts and it suddenly stopped when either the motor failed or the fan finally got stuck. Replacing the blower motor and possibly fan should get you back to having AC! You may also want to check the fuse as it may have blown when the fan got stuck.

      Thank You,


  3. jihn on July 11, 2015 at 5:26 pm

    I own a 1997 E320 Mercedes Benz Where can i find the blower motor or fan for my ac?

    • BlueDevil Pro on July 15, 2015 at 7:14 pm


      Thanks for your question about your 1997 E320. The blower motor in your car is under the passenger side dashboard. If you can get to the bottom of the dashboard there should be a plastic panel on the passenger side you can remove to expose the blower motor. There are 4 screws that hold it up under your dash. It is a common problem in these cars for the regulator to go bad keeping the motor from running on high speed. There are a few different options available for replacing that regulator with a new less expensive model so you may consider that before replacing the whole blower motor.

  4. Diamond on July 11, 2015 at 9:40 pm

    My switch in my car works very well, but the air would not blow out at all as I switch till high to low, before it broke my ac can only work on high or I had to drive just for my ac can kick in real good but I drive 1999 Saturn SL2 !

    • BlueDevil Pro on July 15, 2015 at 7:21 pm


      Thanks for your question about the AC in your SL2. Your AC only working on high probably has to do with the blower motor resistor. It controls the speed of your fan and if it brakes it will only work on high. Try replacing that resistor first to see if you regain control of the fan speeds. Your AC only working while you are driving might have to do with a low refrigerant level, or it may be an indication that your electric fans are not turning on. Try checking the fuse and relays for your fans to make sure they are turning on when you turn the AC on.

  5. cipriana on July 13, 2015 at 10:04 am

    My AC was working fine til today I just started my car an the AC just shut off. There’s no fan blowing at all and the fan doesn’t even turn on for the vent to defrost, what could this be and is it expensive to fix?

    • BlueDevil Pro on July 17, 2015 at 10:57 am


      Thanks for your question about your AC. Depending on what kind of car you have, it should be a pretty simple fix. The problem sounds like it is with your blower motor, not your AC system. Hopefully, the blower motor simply blew a fuse. Find your fuse panel and check the fuse for the “blower motor” or “vent fan” or something like that. The other possibility is that the fan resistor is completely burnt out and needs to be replaced. That is also a quick and relatively cheap fix. Worst case, your blower motor itself actually went bad, but that is very unusual.

  6. Lawrence McPhail on July 16, 2015 at 5:59 pm

    I took my car to the car wash for the first time a couple weeks ago and ever since then my air has gone in and out. Sometimes if I slam the door it will start blowing. If I pick up high speeds on the interstate it may blow as well. The last day or two neither has helped the air blow. It blows a little bit and it’s still cold but will not blow like it should. What should I do?

    • BlueDevil Pro on July 27, 2015 at 1:34 pm


      From your description it sounds you’re having trouble with the blower in your car. It is possible that while washing your car you got some water down into your ventilation system and that has caused a short in the blower motor. Hopefully the motor itself is good and it’s just a wiring issue. Depending on what kind of car you have, the blower motor can be relatively difficult to get to, but they are usually located behind the dashboard on the passenger side. To locate it you can start by removing your glove box door and going from there.

      Thank You!


  7. Nick Collard on July 19, 2015 at 7:12 pm

    Hi. I bought a used 2004, F-150 Heritage. When I bought it, the a/c blew nice and cold but only on high. So, I assumed I needed a new resistor. After a while of this, I started it one day and it did not blow at all. Then another day, It blew but after slamming the door hard after getting in the truck. Now, it just stopped all together. Ok, I struggled to get out the old resistor (mostly by feel as it’s cramped down there) and it looked like it was in good condition. So, I put the new one in and checked the fan. Nothing. No blower at all on any speed, with a new resistor. I am lost now on what to do. Any advice? Thanks, Nick.

    • BlueDevil Pro on July 27, 2015 at 1:56 pm


      The problem you are describing does sound like a blower motor resistor problem, so it was smart to replace that. The fact that things changed when you slammed the door makes us think it is probably a wiring problem. Tracking down electrical issues like loose wires can be very tedious. To get you started, check out our article about that here: https://gobdp.com/blog/diagnosing-electrical-problems/.

      The next component to look at would be the fan speed knob in the HVAC controls and then the actual blower motor to make sure all the wires are connected properly and have continuity to the next junction or component. It may help to find a wiring diagram for your truck as you’re going through the process to help you keep track of what you’ve already checked.

      Thank You!


  8. Linus Anderson on July 22, 2015 at 2:55 pm

    I have a 2003 Dodge Ram 1500 Pickup Truck I was driving and smelt electrical wiring burning type sell and once I turn the A/C off the smell went away now my A/C will not blow. What could this be?

    • BlueDevil Pro on July 27, 2015 at 2:00 pm


      Thanks for your question about the air conditioning in your Ram. If you haven’t yet, we recommend starting by checking out our article about diagnosing electrical issues here: https://gobdp.com/blog/diagnosing-electrical-problems/.

      It sounds like the burning smell you noticed and the AC not working are related and since you noticed the smell in the cab of your truck it sounds like you may have a short in the wires in your ventilation control panel. If you can, try removing those controls and look for burnt or blackened wires. If you don’t see anything wrong there, you can try starting at your AC compressor and finding the wires going to it and trace them back to the wiring harness again looking for burnt spots or anywhere they may have shorted out.

      If you find an area of burnt wire and have the patience, simply remove all the burnt wire and replacing it with the same gauge wire. Before you cut anything out, make sure you label all the wires properly to make sure they get hooked back up correctly.

      If you don’t find any burnt wires, try heading to your fuse panel and looking for burnt out or melted fuses to help you find the source of your problem.

      Thanks Again!


  9. John on July 26, 2015 at 6:46 am

    The AC is working but not cold. I’m using Honda Accord 04 model.

    • BlueDevil Pro on July 28, 2015 at 8:53 am


      You may be low on refrigerant. Usually if the refrigerant becomes low you very likely have a leak somewhere within your A/C system.

      We recommend adding 1 can of the Red Angel A/C Stop Leak (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) and then following it up by recharging the system with the proper amount of R-134a.

      Thank You!


  10. Jenny on July 31, 2015 at 5:21 pm

    It has been very hot this summer, i got in my car to go to work and i tried to turn on my ac it had been working the night before but now it just dose not do anything. the rear window de froster works, but im getting no air hot or cold from my car.

    Is this going to cost me an arm and a leg to fix
    05 ford focus

    • BlueDevil Pro on August 10, 2015 at 10:47 am


      Thanks for your question about your 05 Focus. If you don’t have any air blowing then the problem is with your blower motor rather than your AC system. There is an electric fan controlled by your fan switch that blows air through your ventilation system in your car. Most of the time these problems are caused simply by a blown fuse so we recommend finding the fuse panel inside your car and checking those fuses. It is also possible that the fan switch, fan motor, fan resistor or the wiring is causing the problem. For a quick read on electrical problems like this, check out our article about that here: https://gobdp.com/blog/diagnosing-electrical-problems/

      Thank You!


  11. Ryan on August 2, 2015 at 8:37 pm

    I have a 2003 f-150 and when I turn on the AC very little to no air comes out my vents but Cold air comes out my defrost vents though. If I just turn on my regular vent air, then I have no problem air comes out all the vents. So I’m not sure where to start with my AC problems thanks!

    • BlueDevil Pro on August 11, 2015 at 3:33 pm


      The climate control system in your car uses a series of motor controlled doors to direct air in the ventilation system. As these doors move they direct cabin or outdoor air over the heater core or straight through the ducts. It sounds like the air is being cooled by a properly functioning air conditioning system, but then some of the air is mistakenly being directed over the heater core as well. This is most likely due to a burnt out servo motor or a stuck ventilation door.

      Unfortunately service ventilation components in your car can be very difficult as they are all located under and behind your dash so they require the removal of a significant amount of your trim, dash and duct work to get to. 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.

      Thank You!


  12. Kregg on August 9, 2015 at 8:37 pm

    I drive a 2003 hyundai tiburon. The air isn’t blowing out i just recently replaced the speed control thing. Im not sure if i need a new blower motor or resistors which should i check first?

    • BlueDevil Pro on August 12, 2015 at 9:42 am


      We recommend checking the resistors first as they will often get hot and can burn out. Changing them can be a relatively easy job; hopefully this will remedy your problem.

      Thank You!


  13. louis prince on August 11, 2015 at 4:46 am

    i have a 1997 jeep grand cherokee,ac works but can not get any air out of the vents.can hear what sounds like a door close and stops air from coming out the vents.how can i fix the problem.i hear the air blowing but will not come out.

    • BlueDevil Pro on August 11, 2015 at 3:52 pm


      You may want to consider checking the blend door in your ventilation system. If it is broken or out of position it could be causing the cold air from your AC system to be reheated by the heater before it is blown out your vents. If anything is broken or out of place, the ventilation/blend door may be stuck and causing your problem.

      Thank You!


  14. leslie on August 13, 2015 at 4:31 pm

    I drive a 05 chevy z71. For the past couple years our air and heat has not worked. It will work when you get up to speed and blow out cold air or heat but if you are just idling nothing at all blows out. I don’t hear anything running at all. Now it will randomly blow out heat when the air conditioner is selected and your driving. Any idea of what it could be? I’ve asked multiple mechanics and no one has an idea and haven’t had the time or money to take it somewhere yet.

    • BlueDevil Pro on August 21, 2015 at 12:16 pm


      Thanks for your question about your Chevy. It sounds most like you’re having some sort of electrical problem with your ventilation controls more than with your AC system or heat. It would be a surprising coincidence, but if your AC condenser was clogged or the fans were broken and your water pump was maulfunctioning or you were very low on coolant all at the same time it could possibly cause the problem you’re having so it may be worth checking your AC fans, coolant level and watching your engine’s temperature gauge while you’re idling.

      The ventilation control in your truck is a module that can malfunction so that is also possible. Unfortunately, it would be difficult and take a lot of patience to test all the outputs to see if the module was indeed faulty. You can try calling a local Chevy dealership to see if this is a common problem for your truck or you could try finding another ventilation control module from a junk yard or Ebay and see if it fixes some of your problems.

  15. SW on August 15, 2015 at 2:49 am

    Hi – my AC has stopped working a couple of times now.

    The problem appears to be intermittent as the AC has resumed working perfectly after some time.

    The problem also appears to be with the blower fan as I cannot hear it working.

    What do you think the cause of this is? I intent on taking it to the dealer as it’s still under warranty.


    • BlueDevil Pro on August 21, 2015 at 1:14 pm


      Thanks for your question about your air conditioning. If your car is still under warranty then we definitely recommend taking it to the dealership for repair. Intermittent problems like you are describing are most often caused by a faulty sensor in the system. That can be difficult to track down, but your dealership will be the best one to help you with that.

  16. Beverly Causey on August 17, 2015 at 8:40 pm

    My daughter’s 2007 Mazda CX7 has recently starting having ac problems. The a/c seems to blow just fine in the mornings, but when she gets in her car to head home from work in the afternoons, it doesn’t work. When the air blows, it is cool as it should be but sometimes it doesn’t blow at all and for some weird reason it always seems to be in the afternoon/evenings. Any info you can provide will be helpful.

    • BlueDevil Pro on August 21, 2015 at 2:04 pm


      Thanks for your question about your daughter’s Mazda CX7. It sounds like the problem you’re having isn’t actually with the air conditioning system, but with your ventilation blower motor. The fact that it is intermittent and no air blows at all when it breaks makes us think it is an electrical issue. When things get hot, like when your car has sat in the sun all day, often electrical issues can show up due to higher resistances and expansion of components. For a short read on electrical problems, check out our article about that here: https://gobdp.com/blog/diagnosing-electrical-problems/. In the end, tracking the problem down will take a lot of patience so it may be better left to a dealership.

  17. Rose on August 18, 2015 at 10:03 am

    I have a 2003 ford expedition and when I turn on the AC very little to no air comes out my vents but Cold air comes out my defrost vents though.

    • BlueDevil Pro on August 19, 2015 at 12:47 pm


      Based on your description, it sounds like you may have a vacuum related issue. One or more of the plastic tubes that connect from your firewall may have cracked or deteriorated, causing you to lose vacuum to your hvac controls. We would recommend having these plastic tubes inspected and replaced if necessary.

      Thank you!


  18. LASHANA on August 19, 2015 at 2:41 pm

    Hi, I have a 2006 chevy equinox. The a/c stopped blowing cold air about a year ago. I bought the Freon product from the auto part store and put it in and it worked for just about 2 days. Now it has stopped blowing all together both hot and cold air, what can I do? I also have a 2002 Pontiac grand prix that will only blow on high but will only blow cold air. when you turn the ac off and switch the setting to heat the air still blows cold, what can I do for that one?

    • BlueDevil Pro on September 2, 2015 at 5:45 pm


      Thanks for your questions. First, let’s get your air blowing again in you equinox. The fact that it doesn’t blow at all is an indication that something is wrong with your blower motor. Hopefully, you just blew a fuse so try locating the fuse panel and checking the fuse for the blower. If that isn’t the problem you may have a faulty motor control switch or loose wiring to your blower motor as those don’t often fail. Once the blower is working again if your AC works, great! If not try adding BlueDevil Red Angel AC Stop Leak (available here: http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) then adding freon again to get things back to normal.

      For your Grand Prix it is possible that your hear core is clogged so check your coolant color and make sure it’s bright green and clear. If it isn’t flush the system and see if that fixes the problem. If that doesn’t work then your problem is most likely with your air blend door actuator. Replacing that actuator is difficult as it requires the removal of a lot of the interior of your car so it may be best left to a mechanic.

  19. Tom on August 19, 2015 at 6:43 pm

    I have a 03 Dodge ram 1500. Air won’t turn on. You can feel a little bit of cold or hot air depending on what setting I have it on when I am driving at freeway speeds. You can also here The pump kicking on in the engine compartment. All fuses and relays are fine. I replaced the Blower Motor Resistor. Still won’t turn on, Could it be the Blower Motor Assembly? Again, noting inside turns on and blows when i turn on the control.

    • BlueDevil Pro on September 2, 2015 at 5:49 pm


      Thanks for your question about your Dodge Ram. It is possible that your problem is with the blower motor assembly. You’ve ruled just about everything else out except for a wiring issue. Most of the time blower motors fail mechanically meaning the bearings go bad or the fan blades break before they fail electrically, but it is a possibility. Before replacing the blower motor, we’d suggest checking out our article about diagnosing electrical issues and seeing if all the wiring is correct and intact first. You can read that article here: https://gobdp.com/blog/diagnosing-electrical-problems/.

      Thanks again for your question!
      -BD Auto Pro

  20. Gil on August 24, 2015 at 6:03 pm

    Have a ’03 cavalier. Actually blows on driver and passenger side vents only. Nothing can be felt thru the center vent. What could it be? The fan blower or coolant?

    • BlueDevil Pro on August 25, 2015 at 2:05 pm


      Thanks for your question about your Yukon. Usually when you get different temperature air from different sides or areas of your car the problem is with your dual climate control system. If your car is equipped with dual climate control it may be a bad module, or a stuck blend door. Most likely one of the 2 will be the culprit and the problem can be fixed by addressing them.

      Thank You!


  21. Stephanie on August 31, 2015 at 10:55 am

    I have an 2003 jeep grand cherokee the ac works when it feels like it. Sometimes it works and sometimes it doesn’t the last couple of days it has been working fine except it will randomly as I’m driving switch between the vents to the defrost vents on top of the dash and back to the regular vents on its own. Also as I am typing this I remember for a while only 2 or 3 of the 4 vents in the dash sometimes in the past would have air blowing from them. Now all of them seem to be working but it just switches randomly between the dash and the vents. Any suggestions as to what might be the cause??

    • BlueDevil Pro on September 15, 2015 at 1:56 pm


      Thanks for your question about your 2003 Jeep Cherokee. It sounds like the problem is actually not with your AC system, but with your ventilation system. There are a series of doors and flaps inside the vents in your Jeep that control which vent the air blows out of and whether it goes over the cooling coils, the heater core, or both. I believe on your jeep these doors and flaps are actually controlled by actuators that get their motive force from vacuum from your engine. Your problem might be caused by a leak in one of the vacuum hoses attached to the actuators or a broken check valve somewhere in the system. Due to where the lines are located, inspecting each of them can be quite the project, and the vacuum hose is relatively cheap so we would recommend simply replacing the old vacuum lines while you’re inspecting them to make sure you don’t have any leaks.

      Thanks again for your question!
      -BD Auto Pro

  22. Julia on August 31, 2015 at 5:48 pm

    I have a 2005 Toyota Camry. One second my a/c is blowing ice cold and hard, the next second nothing at all. There wasn’t any noise or anything accompanied with it or anything. It just stopped blowing completely. Any suggestions on why and/or what I could do to remedy it myself, other than take it in to an expensive mechanic?

    • BlueDevil Pro on September 15, 2015 at 2:05 pm


      Thanks for your question about your Toyota Camry. The problem you’re having sounds like an electrical issue with your ventilation blower motor. It sounds like for some reason the fan is losing power. That could be due to a bad fuse, a bad blower motor resistor or loose wiring. You can check the fuse easily, simply find the fuse panel in your car, it will be somewhere on your dashboard, either below your steering wheel, at a kick panel or outside by where the door closes. Since the problem is intermittent you can try simply replacing the fuse even if it looks good as they are inexpensive at most auto parts stores. If your fan stops blowing on one speed but works on another, then you have a bad blower motor resistor. Those are also relatively easily to replace on your car with simple tools and a little research.

      If neither of these turn out to be the problem then you’ve got a loose wire somewhere either on the motor, the ventilation controls or in between. Wiring problems can be a lot of work to chase down, but if you have patience and the right electronic meter you can do it. Try checking out our article about electrical problems here: https://gobdp.com/blog/diagnosing-electrical-problems/.

      Thanks again for your question!
      -BD Auto Pro

  23. Jimmy on September 2, 2015 at 8:47 am

    Hi I have a 1999 Ford F-150. A few years ago my AC stopped working. The vents blow air just fine but it’s just not cold air. I have added R134a refrigerant and saw the compressor begin to engage properly. It worked and blew cold air but within a few days to a week at most the air stopped being cold. I also noticed a smell inside the cab of the truck. I am thinking the refrigerant is leaking into the cab causing this smell and through research am now lead to believe there’s a leak most likely on something called the heater core which is behind the dash board. Do you folks concur with the idea? I mean if I can smell it in the cab it must be leaking freon inside there right? I’ve been told it’s a rather time consuming job to tear apart the dash and replace the heater core so I’d like to be more certain that’s the issue before I delve into it. It’s been a few years since I’ve tried anything again. The couple times I did add r134a the compressor engaged and began to blow cold. It just obviously has a leak somewhere and I’d like your opinion on its likelyhood of it being this heater core thing. Would appreciate any knowledgable input. Thanks, Jim

  24. Emily on September 2, 2015 at 7:58 pm

    About a month ago, my ac started blowing warm air. I took it in to the mechanic and they refilled the freon and it worked again for about a day or two. Then it started blowing warm air again and now it won’t turn on at all no matter what setting is on. Does this sound like a compressor issue or the fan?

    • BlueDevil Pro on September 17, 2015 at 10:11 am


      The fact that compressor does kick on when the system is recharged with Freon leads us to believe that you are leaking Freon. The Freon levels have probably become so low that compressor is no longer coming on.

      We recommend adding 1 can of the Red Angel A/C Stop Leak (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) and then following it up by recharging the Freon to the proper level.

      Feel free to contact our tech support team at 888-863-0426 with any questions.



  25. Jimmy on September 3, 2015 at 9:30 am

    Through further research I realized it’s called an evaporator core not a heater core. I’m just looking for advice to confirm that the evap core is most likely the culprit. I don’t suppose blue devil can seal something as large as a big leak in an evap core if that’s def where it’s leaking?
    Thanks for any input. Jim

    • BlueDevil Pro on September 18, 2015 at 2:51 pm


      The product that we have for sealing a leak in the evaporator is called the Red Angel A/C Stop Leak (http://store.gobdp.com/a-c-stop-leak-aerosol-00222/). Red Angel will seal leaks in A/C systems that can hold 5 inches of vacuum for 25 minutes or 15 inches of vacuum for 5 minutes. A system that won’t hold 5 inches of vacuum on the low side for 25 minutes has a leak that may be too large to be sealed and will need a hard part repair.

      Thank you!


  26. stephany on September 4, 2015 at 12:22 am

    I have a 2003 chevy astro van. a few weeks ago I was having problem with the rear air conditioner working. it would only work some of the time. then it just stopped working. this knob is completely separate from the front of the van. I also noticed the heat wont even turn on back there now too.
    I was thankful enough to still have the ac working in the front of my van. but as I was driving it the other day, all of a sudden the vents stopped blowing air. the ac is still cold. there is little ac coming out the defrost on my windshield, but It wont switch to the different settings. what do you think I should do?? I would like the different setting to work in my van. including the rear, ac and heat.
    the checked the heat too and that wont come out of the vents either.

    • BlueDevil Pro on September 19, 2015 at 10:04 am


      The problem you’re describing in your van sounds like it is more of an electrical issue rather than your air conditioning being broken. That is good news because usually those are less expensive problems to fix. Since you aren’t getting any air blowing, it sounds like your ventilation fan motor is either broken or has an electrical short. This could be from a fault in the actual fan switch, the resistor pack or the motor itself. For more information on how to track down the electrical problem, check out our article about that here: https://gobdp.com/blog/diagnosing-electrical-problems/.

      Thanks again for your question!
      -BD Auto Pro

  27. irene on September 4, 2015 at 10:56 am

    My ac was working really good but one day started making a noise as if it was feet and water was coming out where the gas pedal was and now my ac does not work at all does not blow out no air at all

    • BlueDevil Pro on September 19, 2015 at 10:22 am


      Thanks for your question about your air conditioning. The problem you’re describing sounds like your evaporator iced over while you’re AC was running and it sounds like that also shorted out your blower motor. Replacing your blower motor will get your air blowing again and shouldn’t be too difficult of a job depending on what kind of car you have.

      Once you’ve got a new blower motor installed, you need to make sure your AC system doesn’t freeze again so you don’t short out your new motor as well. First, there should be a small drain hose in the bottom of your air box. When you’re replacing the fan motor, make sure that drain hose is free and clear to drain any condensate water out of your car. Next, make sure your cabin air filter is clean and not clogged with dust or debris. Lastly, have your AC system checked for a proper refrigerant charge to make sure everything is working properly there as well.

      Thanks again for your question!
      -BD Auto Pro

  28. irene on September 4, 2015 at 10:57 am


  29. Debbie on September 9, 2015 at 7:46 pm

    I have a 2008 Altima, 140,000 miles. the air conditioner is working intermittently. you can hear the blower, but no air blowing out. At times if I turn the fan up it will start blowing. It has always maintained coldness. Because it’s intermittent it is difficult to get diagnosed.

    • BlueDevil Pro on September 24, 2015 at 9:02 am


      Thank you for your question about your 2008 Altima. Based on your description, it sounds like the compressor may need to be replaced. It sounds like it is beginning to fail and will eventually stop working altogether. We recommend taking the Nissan into an A/C specialist to be addressed.

      Thank you!


  30. Chris on September 10, 2015 at 11:48 am

    Hello, I have 2003 Hyundai Tiburon Gt V6. When I bought the car, the air worked and blew semi-cold air. After a few months it only blew hot air. I thought there might be a leak so I bought some freon with stop leak ib it. Now it blows semi-cold, but not cool. I am kind of stumped on what the problem might be. Any help would be appreciated.

    • BlueDevil Pro on September 24, 2015 at 1:21 pm


      Was the A/C system recharged to the full level? If not, that may be the reason you are not getting the full cooling effects. We recommend recharging the system to the “full” level and then test it. Beyond that, you may want to pay a visit to an A/C specialist in your area.

      Thank you!


  31. Geoffrey on September 14, 2015 at 1:19 am

    Hi. I have a 2010 mercury Milan. My a/c was working, however I’ve noticed the last few days that there has been an excessive amount of moisture on the ground at idle. It also sounds like my fan is running about 10x the regular RPMs. Today my a/c has stopped blowing completely. I popped the hood and my freon lines are completely frozen. I thought about charging the system but would like some advice first. Thanks.

    • BlueDevil Pro on September 25, 2015 at 1:06 pm


      Thanks for your question about your Mercury Milan. If your lines are frozen then adding refrigerant may not help the problem. Usually when an AC system freezes up it’s actually because the evaporator is not getting warmed enough by air from your cabin. Most of the time that is due to a clogged cabin air filter. Try having your cabin air filter changed first to see if that fixes your problem.

      Thanks again for your question!
      -BD Auto Pro

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