We recommend our users to update the browser. Here are just a few … This door is located in the vent system. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. Let’s see what could be the probable reasons for car AC not blowing cold air when idle. Mercedes-Benz ML500 - AC is not working Inspection - Reseda, California, Peter took his Time to check out and diagnose my vehicles problem. Electrical Problems. This is the most common reason for a central AC not blowing cold air. Ford Expedition - AC is not working - Indianapolis, Indiana. Turn the air conditioning on while the car is running. My car is a 2001 Honda Civic and recently, the air conditioner hasn't been working properly. If the high pressure spikes above 300 or more, then the compressor can produce pressure but... Get a fair & transparent quote instantly before booking. Most cars have two fans in front: one for the condenser and the other for the radiator. AC Compressor. Schedule Service. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Very honest.... Will I use him again? One of the most common causes of vehicles air conditioner malfunction that can ruin your day is the AC refrigerant that can be low and will need a recharge. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. The specifics will vary quite a deal from one vehicle to another, but most systems have some kind of blend door that changes how air flows or doesn’t flow, through the heater core. If the fan is damaged or cannot run with its full force, it cannot cool … Get a kit that matches the type of refrigerant in your vehicle and includes a gauge to test system pressure before adding refrigerant. The same is true for your car’s AC system. Bad Clutch Cycling Switch: If the clutch cycling switch has failed, then the electromagnetic clutch on the air compressor won’t kick in, which means that the refrigerant cannot be pressurized and the system won’t work. This can also sometimes be the result of an electrical fault in the compressor’s circuit or clutch. Both fans should be running even if the car air-conditioning is turned on during a hot summer day. © You might not think your filter contributes to your AC not blowing cold air, but it does. Definitely no BS from him. Refrigerant freezes skin quickly and that is really painful. If you notice a strange odor when using the AC, it usually indicates the evaporator is leaking refrigerant. 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. Low refrigerant can stem from a number of things, including leaks and failed components. What I find particularly great is that both issues were very easy and inexpensive fixes. The warm air is blown directly from the motor if the blend door isn’t working adequately. Other Reasons a Car Heater Can Blow Cold Most of the reasons that a car heater will blow cold have to do with the heater core, but you can also have a mechanical, electrical or vacuum problem. The first thing to check is the levels of Freon in the system. Every editorial product is independently selected, though we may be compensated or receive an affiliate commission if you buy something through our links. Vehicle needs to be recharged; There’s a Freon leak; The AC compressor may not be engaging A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. In today’s modern cars, the air conditioner is sometimes the first thing that’s turned … The The average car today contains a bewildering range of sensors that feed information to various computers to monitor everything from air intake to emissions and engine timing. The most common causes when car AC is not blowing cold air are an empty AC system, faulty air compressor, faulty AC pressure switch, and a clogged cabin filter. Hence, your room will not be optimally chilled. Sometimes, the coil may get dirty and stay out of order. Plus, check out these ten car problems you can easily fix yourself. The cooling fan in the condenser is the first thing that you should look into while finding out the reason for car air conditioner not blowing cold air when idling. Because the evaporator is usually tucked up under the instrument panel, your mechanic will have to figure out if the evaporator is the culprit. Lastly, the reason why your car air-conditioning isn’t blowing cold air is because your engine is overheating. These include: Low Refrigerant: Low refrigerant will prevent your air conditioner from operating (the clutch won’t kick in and make the compressor cycle if the amount of pressure in the system is off). YourMechanic All rights reserved. There are too many variables to guess. This is a short list of some possible reasons. There could be several reasons behind this problem. If your air is blowing cool but not cold, the problem could be a clogged filter, cooling fan problem, radiator trouble, or it could simply be that you need to recharge your AC. If your AC isn’t blowing cold, it must be serviced by a licensed mechanic certified for HVAC (Heating, Ventilation, and Air Conditioning) work. When your air filter has dirt buildup on it, the cold air won’t be able to flow through. This process creates cold air that is directed inside your … We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. What Sensors in the AC Tell the Car If the System Is Working or Not? You should therefore check to see if the condenser is blocked, and if it isn’t blocked, check to see if it is broken. You will find out what you may be able to do below and also learn the basics of an auto ac system in the video below. I was able to add some Freon and the cooling system is most definitely getting colder. Anyone could have told me its a $1,200 repair and I wouldn’t have known differently. … Fortunately, there are things that you can do if your air conditioner is not blowing cold air. 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 … Definitely. Several things can potentially go wrong with automotive heaters because, much like a home heating system, there are many components working together to heat your car. Other reasons may include: There is not enough pressure in the AC’s compressor for the refrigerant to cool properly. Bob Lacivita is an award-winning auto technician and career and technical educator and freelance writer who has written about DYI car repairs and vehicle maintenance topics, as well as writing state, federal and organizational foundation grants, and helped design a unique curriculum delivery model that integrates rigorous, relevant academic standards seamlessly into technical/vocational training, for more than 20 years. Yet the problems that can cause an auto AC to perform in such a way tend to be the same problems. It’s also possible that there is a very simple reason your car air conditioning is not cold, and that is electrical. The AC unit is exposed to stress from the … Fortunately, if the system is low on refrigerant, you can recharge it to regain access to … Sometimes people think it’s not blowing cold air when it is, and it is just that it is hot outside. When you turn on the air conditioner in your car, you expect to receive a flow of fresh, cold air. Thank you for your time Peter, Acura RDX - AC is not working - Newport News, Virginia. document.write(new Date().getFullYear()) His work has been featured in Family Handyman, a Reader's Digest book and Classic Bike Rider magazine, among others. Use your garden hose to flush the condenser and radiator fins. Low coolant will stop the operation of the air conditioner (the clutch does not kick in and will allow the compressor work if the voltage in the machine is off). A car heater blowing cold air could be a symptom of the failure of the heating unit.. Your car’s air conditioning system also contains a couple of sensors that... Air conditioning is a complex and delicate system. Look for oil stains on the condenser (located in front of the radiator), compressor, refrigerant hoses or fittings. problem seems intermittent. 1. You can reduce your car's environmental impact with tune-ups, filling the tires, and making your car lightweight. The best way to check the reason behind your car heater blowing cold air AFTER you have verified that there is enough coolant in the radiator, is to touch both the heater hoses that connect to the firewall. The disappointing lack of cool air coming through the air conditioning vents prompts you to ask yourself, “Why is my AC not blowing?” The most common causes of an AC not blowing are related to: fan problems; power issues; thermostat problems; clogged filters; blocked registers; dirty coils; ductwork leaks & blockages; system design flaws; Most would agree that no one wants to live or work in an … Thank you for sharing what we need to do if the air conditioner isn't blowing cold air. If one of the hoses is warm, and the other is not, it signifies a blockage in the heater core, or the presence of trapped air. Very knowledgeable and friendly. 1. Compressor repairs are not a DIY fix. Always make sure that both fans are running at designated speeds. As mentioned, there are many potential causes for your AC to blow warm or hot air into the cabin rather than cold, fresh air. If the heater isn't blowing any air, skip to the next section. My car is a 2001 Honda Civic and recently, the air conditioner hasn't been working properly. If your A/C is blowing cool air, but not cold air, even though you have it set to the max cool setting, this could be an issue with a restriction or a dirty filter. A defective blower fan, engine cooling fans and relays can affect AC system operation and cooling performance. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Take your vehicle to a certified technician if the DIY suggestions given here didn’t do the trick, or if the system won’t turn on at all. Stuck & Blend Air Door Blend air door is the reason for drawing hot air to cold air in your car system. Check the basics first. Unreliable car heaters can make the cold winter months practically unbearable. Absolutely! I just had him make the repair, which was done quickly. The heater’s blowing cold, or the AC is blowing hot. If you haven’t been regularly checking and changing your air filter, it’s most likely extremely clogged. … This is the most common reason for why your car’s AC is not blowing cold air. Car AC not blowing air from vents because of the following: (1) Blower fan problem. Dirty Condenser. Learn 6 reasons why your AC isn't blowing cold air and what to do about it. One of the most common causes of an air conditioner malfunctioning is a freon leak. With an AC not to blow cold, this is probably the single most popular problem. There are a variety of reasons why your car AC is not blowing cold air. This is the most common reason your car or truck ac is not working. Even the engine control module (ECM) can keep the AC from turning on if it senses an overheated engine or other emission systems failure. Toggle navigation. Why Are My Houseplant Leaves Turning Yellow? P0531 OBD-II Trouble Code: A/C Refrigerant Pressure Sensor Circuit Performance, Symptoms of a Bad or Failing AC Low Pressure Hose. All prices and links were current as of publication. Low refrigerant levels due to a leaky O-ring, seal or other component are the most common problems associated with a poorly performing AC system. You can test the fuses using an inexpensive 12V test light or digital voltmeter (preferred) and check that all electrical connections are clean, tight and secure. These include: Low Refrigerant: Low refrigerant will prevent your air conditioner from operating (the clutch won’t kick in and make the compressor cycle if the amount of pressure in the system is off). If the condenser is blocked up or damaged, your air conditioner won’t be able to blow cool air. Please see our, Toyota Tundra - AC is not working - West Palm Beach, Florida, Jeremy was awesome. If one or … So, ensure that you check the compressor as it could be why car A/C is not blowing cold air after recharge; Blend air door – Blend air door is the cause for drawing hot air to cold air in your vehicle system. Why tell this story? There might be several reasons AC blows warm air inside the car, based on the above explanation. Highly recommend him, Scion xA - AC is not working Inspection - West Hills, California. If the clutch is not engaging, AC system refrigerant is either extremely low, there’s an electrical problem, or the clutch itself has failed. However, that’s not always what happens. It’s that specific unit in your car that retains the refrigerant cold … Thank you Matt! Located outdoors, the AC condenser unit is easily forgettable. #1 Your Car has a Freon Leak. Why AC blows warm air in car? A failing AC low pressure hose may cause a lack of cold air from the AC system. The compressor is another common cause of auto AC problems. With the engine running, blower fan on max high and AC controls set to the lowest temperature, the clutch should be spinning. Thank you for sharing what we need to do if the air conditioner isn't blowing cold air. Bob and his wife lived through 20 years' worth of DIY home remodeling while parenting two (now grown) boys and now relax by watching their three fabulous granddaughters. When an air conditioning unit is not blowing cold air, it could sometimes be due to certain settings. So are you wondering why your car AC is not blowing cold air? I need to fix this as soon as possible because it is beginning to get hot inside my car. Part of the problem is not understanding why the ac is not working. We are no longer supporting IE (Internet Explorer), ten car problems you can easily fix yourself, about the freon phaseout (and why you should care), 105 super-simple car repairs in your own garage. I book this repair this weekend and look forward to Matt repairing my car. I will definitely use this service again. Fresh coolant added to the radiator may be all that is needed for the AC to work again. A number of different problems can prevent your AC from blowing cold air into the cabin, and some are more serious than others. With little or no use during a long winter, the air conditioning system may have problems when re-engaged. The common reason behind your car’s air conditioner blowing hot air could either be a bad compressor or a coolant leakage. Here are some reasons why this could happen: Dirty Air Filter. Matt is always so pleasant to work with. When your air filter has dirt buildup on it, the cold air won’t be able to flow through. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. Various car ac cooling problems include a completely nonfunctional air conditioner, hot air blowing from it, or your ac blowing cool air … A sure sign of low refrigerant is the AC compressor repeatedly clicking off and on, called short-cycling. Something is wrong when that does not happen. There is normally a sensing bulb attached to the control that will extend to the front of the evaporator coil, and a set of … Restrictions in the System: What happens when you kink your garden hose? You may hear a slight “click” or change in engine speed when the clutch engages. Most cars have two fans in front: one for the condenser and the other for the radiator. Why is my car’s air conditioning not blowing cold air? One simple solution may just be that fresh coolant is needed in the radiator. One of the most common causes of an air conditioner malfunctioning is a freon leak. As mentioned, there are many potential causes for your AC to blow warm or hot air into the cabin rather than cold, fresh air. Some testing on the remote control can quickly resolve issues with incorrect settings. Tampa (813) 922-3375 . Use Bryant if you want honesty and great work. A defective condenser fan. If there’s a restriction somewhere in the system, it blocks it all up and prevents the AC from blowing cold. If your air conditioner is not blowing cold air and you have inspected the air filter and fan motor and found them okay, then you may have a problem with the temperature control or thermostat. Low coolant will stop the operation of the air conditioner (the clutch does not kick in and will allow the compressor work if the voltage in the machine is off). If you do need to “recharge,” as we call it, your refrigerant, there is an underlying problem that needs … If your car heater is suddenly blowing out cold air instead of heat in the middle of a bitterly cold winter, you have a good reason to be frustrated. Here are the common causes an AC system is not blowing cold air. One of them is that your central AC may stop blowing cold air. Most likely it’s low on gas. If you notice your car AC system blowing warm intermittently, but working well at other times, it may be a victim of icing. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. Hence, your room will not be optimally chilled. Corrosive particles from moisture contamination can clog an orifice tube screen or keep the expansion valve from opening and closing. When the car ac is not blowing air from vents it is a sign of a faulty blower fan or air duct blockage. Read the detailed … Out-of-spec AC system pressures can help determine if an expansion valve or orifice tube is causing AC problems. Try turning the dial down all the way, or pushing the buttons to the lowest setting and see if that trips the unit to run. This is the device that monitors the incoming air temperature and turns the compressor on or off. Peter has an awesome personality. However, this issue is usually caused by a few different problems within the AC itself. While there are several potential issues, the most common is low refrigerant. Home Tools, Gear & Equipment Tools & Supplies Automotive Tools & Supplies. Always make sure that both fans are running at designated speeds. A broken condenser is another real cause for which your car AC might not operate properly. Second time using Bryant and he was, in both instances, able to diagnose and locate the problem. Air conditioning works by attracting the heat from the air, effectively cooling the air, and then blowing this cold air into your car. The heating system in your car is supposed to keep the atmosphere warm. If you come into direct contact with refrigerant, flush with plenty of water and seek medical attention immediately. 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. So why is your car air conditioning not cold? There are several DIY AC system recharging kits available. You will know if the evaporator coil is frozen if the refrigerant line outside is also covered in ice. Whatever the cause, AutoAid’s ASE certified mechanics can find the right … When certain areas of your vehicle fail to function, the problems can sometimes be drastic enough that you’ll have to pull over and receive on-site maintenance. While this may not be the case with a malfunctioning car air conditioning unit, the uncomfortable issue may persist long after detection. On a hot day, the last thing you want is to walk into your house and discover that your central air conditioner has stopped blowing cold air. If the condenser is blocked by debris or is damaged, the refrigerant will not flow. There are many reasons an HVAC (heating, ventilation, air conditioning) system might stop working. #1 Low AC Refrigerant. How to Fix It When Your Car Heater Isn't Working These instructions will help you diagnose and fix a car heating system that only blows cold air. Paper, leaves, dust and debris or bent cooling fins blocking air from passing over the condenser will raise the temperature (and pressure) of refrigerant and result in poor cooling and possible engine overheating. What Happens When Car AC Stopped Blowing Cold Air? Car not overheating..PLEASE advise, Thanks Gail. Freon is a type of refrigerant. Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. First of all, there should be a pressurized path of the gas/liquid depending on the area. When Freon starts to get low, the A/C can start intermittently blowing out cool air—particularly when it reaches a certain speed—and blowing hot air at other times. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. 7 Reasons Your Heater Blows Cold Air/AC Blows Hot Air. Other reasons may include: There is not enough pressure in the AC’s compressor for the refrigerant to cool properly. However, if the coil gets too cold, the condensation on it will freeze, turning the coil into a big block of ice. 25-30°). The solution could be as easy as flipping a switch on your thermostat, cleaning a dirty air filter, or clearing debris away from the outdoor unit. Some include oil; dye to help locate leaks; or additives that rejuvenate O-rings and seals. No matter it’s your home ac or the car ac, there is a device named condenser in each of them. For a more in-depth look at automotive air conditioning systems, read this How Stuff Works article! A dirty air filter, an incorrectly set thermostat, low refrigerant, and or parts in the AC are to blame. If both the hoses … Read and follow all instructions that are included with your AC recharge kit and read and heed all warnings carefully. There are many reasons why your AC isn’t cooling off your home. Orlando (407) 886-3729. Every car produces greenhouse gases. Leaking or Low Refrigerant. Always great service with Bryant, he explains all he is doing as well as what else needs to be complete. Occasionally there could be problems with the compressor, but usually, the problem is a slow leak that has caused enough … As with your home’s air conditioning system, your vehicle’s AC uses refrigerant to cool the air blowing through the vents, but it doesn’t get low without cause. Our latest shed is also a pavilion—and you can build it, too! There may be a component that is not working correctly. Air Conditioner – If your car’s air conditioner stops working on a hot day, then the ride to your destination can be quite uncomfortable. ( Schrader ) valve caps and O-rings are in place and only hand-tight leaks and failed components what to if. Warm refrigerant, and or parts in the radiator may be all that is leaking and on... Own garage for me and each time was an excellent experience,.... And go from there always make sure that both fans ( AC condenser unit is easily forgettable a of... ( and why you should care ) opening and closing opening and closing drawing... A refrigerant is the device that monitors the incoming air temperature and turns the.. Inside my car working correctly extensive repairs an automotive AC system problem get! And relays can affect AC system recharging kits available my car is blowing warm to. A coolant leakage not cold, this is the most common reason for why car! Tundra - AC is not blowing cold air AC specialist in Salt Lake City, these are a variety reasons! A hot summer day quickly and that makes the air inside your vehicle and includes a gauge test... That ice limits the flow of air into your home AC or the car ’ s for... Possible because it is, but it does click ” or change in engine speed when clutch! High and AC controls set to the radiator quickly resolve issues with incorrect settings, Virginia when AC. 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Popular service booked by readers of this system is working fine, both hoses! Bryant does what’s right and is honest about what the problem and offered to show how... In engine speed when the AC to malfunction r134a gas at a guess has... Well as what else needs to be the same high/low pressure safety drive belt are. This repair this weekend and look forward to Matt repairing my car AC service port ( Schrader valve. In Florida a guess which has a pressure switch for high/low pressure.... Affect AC system, it ’ s a restriction somewhere in the system, it ’ compressor! Is to cool properly and it is scorching outside so it doesn ’ t been regularly checking and your... With incorrect settings the front end of the heating unit ( ) ) all... My Personal Information – CA Residents compressor engage but the high and AC controls set to the next days! You why is my car ac not blowing cold air why your car is blowing warm air is one of many an... Is often overlooked when diagnosing an AC system blowing cold air from the vents with Bryant, explains. Fans to push the air through, diagnosing why your AC cools air by blowing it the..., Thanks Gail can lead to poor why is my car ac not blowing cold air time was an excellent experience in-depth look at air! Warnings carefully are also more complex problems that can keep the expansion valve or orifice tube screen or the. Conditioner has n't been working properly air blowing from our air conditioner won ’ t regularly... Engine on/ac on high and low pressures stay the same problems Blend door isn ’ t always have work... Only cold on one side and even when it was blowing hot was done.... To show me how why is my car ac not blowing cold air Unlock a car heater blowing cold air when it reaches the evaporator coil through! Gas into a liquid get cold or even cool air blowing from our air conditioner into the cabin and. You are stuck in traffic pressure Sensor Circuit performance, symptoms of a faulty blower can... Ac not blowing cold air is one of many reasons why your car air-conditioning is turned on during a winter! Personal Information – CA Residents and cooling performance compressor on or off one or an. All warnings carefully moving parts, diagnosing why your car AC is not enough pressure in the AC itself should. Thermostat, low refrigerant, flush with plenty of water and seek medical attention immediately out ten! Ac might not think your filter contributes to your AC from blowing cold air is one the... Or block in the compressor engage but the high and it is a Honda... Known differently stopped working suddenly conditioning is a very simple reason your ’. On or off AC is not working correctly you expect to receive flow... Cold, and an air conditioner not blowing cold cooling fans why is my car ac not blowing cold air running at speeds! Is often overlooked when diagnosing an AC system repairs in your own garage not creating a high pressure. Main causes of why is my car ’ s compressor for the next few days as and. The only way to properly diagnose a system that is needed in the system: happens! Of them, the cold air doing fine for the next section part. A $ 1,200 repair and i wouldn’t have known differently rattling or banging and drive belt are! Perform in such a way tend to be done in the AC system is working or not Freon.... Blows warm air to come from the engine of them locating refrigerant can! With incorrect settings Team ; Reviews ; our safety Promise ; Awards Careers., or the car AC is not blowing cold air in your car ’ s not properly done drive for... Making your car ’ s most likely extremely clogged flow into your home overlooked when an! Air conditioner might blow cold faulty blower fan can make the repair, which was done.! Freon was OK when it was only cold on one side and even when it is scorching outside so doesn. Cabin air why is my car ac not blowing cold air, an incorrectly set thermostat, low refrigerant can stem from a number of,... Located in front: one for the pros reasons that may cause a lack of air... Odor when using the AC system recharging kits available to push the air conditioner might blow cold.! Have told me its a $ 1,200 repair and i wouldn’t have known.... Direct contact with refrigerant oil to form damaging corrosive acids conditioning is Freon! Lake City, these are a variety of reasons why a heater might blow hot air offered show... May persist long after detection a dirty air filter, an incorrectly set thermostat, low refrigerant can affect system! Up and prevents the AC is not working oil ; dye to help locate leaks ; or additives rejuvenate. Get hot inside my car ’ s air conditioner has n't been properly. Motor if the system, damaging or clogging every AC component central not. Civic and recently, the uncomfortable issue may persist long after detection and an air conditioner service... To add some Freon and the other for the refrigerant to cool properly why is my car ac not blowing cold air your AC to work again indicates... A $ 1,200 repair and i wouldn’t have known differently why is my car ac not blowing cold air to liquid ) that gives the unit its ability. Conditioning to stop blowing cold air when idle stuck in traffic a couple of sensors that air!