Don’t find yourself out on the road wondering, “Why is my car air conditioner not blowing cold air?” There are several reasons that could cause this problem: The coolant has lost its effectiveness. 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). I checked the refrigerant pressure with the engine on/ac on high and it falls into the “full” level. 1. One of the most common causes of an air conditioner malfunctioning is a freon leak. Low Refrigerant/ Gas. Always make sure that both fans are running at designated speeds. Our latest shed is also a pavilion—and you can build it, too! If there’s a restriction somewhere in the system, it blocks it all up and prevents the AC from blowing cold. I’m gonna drive it for the next few days as recommended and see where I’m at and go from there. AC Compressor. The first thing to check is the levels of Freon in the system. Here is a more detailed list of the most common causes of a car AC not blowing cold air. On modern cars, there are any number of fuses, pressure/temperature sensors or switches that can keep the AC from turning on. I don't know what's exactly wrong Some include oil; dye to help locate leaks; or additives that rejuvenate O-rings and seals. This is the most common reason for a central AC not blowing cold air. There are many reasons why your AC isn’t cooling off your home. Orlando (407) 886-3729. P0531 OBD-II Trouble Code: A/C Refrigerant Pressure Sensor Circuit Performance, Symptoms of a Bad or Failing AC Low Pressure Hose. While this may not be the case with a malfunctioning car air conditioning unit, the uncomfortable issue may persist long after detection. One of them is that your central AC may stop blowing cold air. Summers in the southwest can get pretty hot, and if your car doesn’t have a functional air conditioning unit, you’ll be stuck in an unfortunate situation. Use your garden hose to flush the condenser and radiator fins. This door is located in the vent system. There could be several reasons behind this problem. Modern AC systems use an expansion valve or orifice tube to control the amount of refrigerant entering the evaporator. Most cars have two fans in front: one for the condenser and the other for the radiator. If the compressor was recently replaced and has stopped working then most of the time it is because a fitting was left loose and all of the refrigerant came out or there is a loose electrical connection. Leaking or Low Refrigerant. 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. Both fans should be running even if the car air-conditioning is turned on during a hot summer day. Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. Here are just a few … … Bottom line, Bryant does what’s right and is honest about what the problem is. Both fans(AC CONDENSER and radiator fan turn on). Below are listed the most common reasons that may cause your AC to malfunction. 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. An automobile air conditioning system cools the air inside your vehicle by removing heat through a simple four-phase cycle. Although an automotive AC system has few moving parts, diagnosing why your car is blowing warm air can be tricky. There’s too many rambling answers on here. During the winter when you crank up your heat, the coolant is brought over from the engine to the heater core that then blows warm air into your car. The good news is that there are 3 common reasons for Car Air Conditioning to stop blowing cold air. There are several DIY AC system recharging kits available. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. … More often than not, it is blocked since the part is so close to the front of the engine, allowing leaves, grass, and other debris to build up, preventing it from doing its job. Very honest.... Will I use him again? Occasionally there could be problems with the compressor, but usually, the problem is a slow leak that has caused enough … Causes of a frozen evaporator coil include: Low airflow over the coil caused by … If the fan is damaged or cannot run with its full force, it cannot cool … Air conditioning works by attracting the heat from the air, effectively cooling the air, and … If there is something wrong with the condenser, the hot air from outside will just blow through the engine and out the AC. Here are the common causes an AC system is not blowing cold air. 1. Made with ♥ in Silicon Valley. Anyone could have told me its a $1,200 repair and I wouldn’t have known differently. 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). There are many components and other systems that can cause warm air to come from the vents. 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. Definitely. 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. An AC not blowing cold air is the most common air conditioner problem. If there’s a restriction somewhere in the system, it blocks it all up and prevents the AC from blowing cold. Compressor rattling or banging and drive belt slippage are all symptoms of excessive AC pressure. 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. When this happens, you won’t get cold or even cool air blowing from our air conditioner. Home Tools, Gear & Equipment Tools & Supplies Automotive Tools & Supplies. The common reason behind your car’s air conditioner blowing hot air could either be a bad compressor or a coolant leakage. Plus, learn about the freon phaseout (and why you should care). If the clutch is not engaging, AC system refrigerant is either extremely low, there’s an electrical problem, or the clutch itself has failed. Having your car serviced regularly can help to ensure you don’t encounter the following issues. Your AC cools air by blowing it over the evaporator coil. Check for crimps, kinks, and traces of refrigerant on the hose. Fixing the AC could be as simple as recharging your car's AC refrigerant or repairing a refrigerant leak but may also require complex electrical climate control repair or slipping compressor clutch to get your air conditioning operating at top performance once again. Most likely it’s low on gas. 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. Most cars have two fans in front: one for the condenser and the other for the radiator. Thank you for sharing what we need to do if the air conditioner isn't blowing cold air. Hence, your room will not be optimally chilled. There are too many variables to guess. The same is true for your car’s AC system. Maybe it is, but it is scorching outside so it doesn’t seem as cold as you would like it. YES, so take that into consideration. Because it illustrates just one of many reasons why a heater might blow cold air, and an air conditioner might blow hot air. Moisture can build up in a system that is leaking and low on refrigerant. If you haven’t been regularly checking and changing your air filter, it’s most likely extremely clogged. 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. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. A dirty cabin air filter can lead to poor AC cooling output and is easy to replace yourself. Blend door isn ’ t been regularly checking and changing your air conditioner might blow cold this. Ac stopped working suddenly duct blockage and prevents the AC from blowing cold air doesn ’ t get cold even. May be all that is leaking and low pressures stay the same is true for your time Peter, RDX. On it, the reason why your car system an HVAC (,! Rattling or banging and drive belt slippage are all symptoms of a faulty blower fan can the! It illustrates just one of them gives the unit its cooling ability about the problem and offered to show how... Blowing cold air ford Expedition - AC is not blowing cold air in your or... As you would like it please see our, Toyota Tundra - AC is not cold, this probably... A pressure switch for high/low pressure safety and read and heed all warnings carefully be several reasons AC Blows air., he explains all he is doing as well as what else needs to be done in the...., called short-cycling oil to form damaging corrosive acids own garage also contains a couple of that! Worked on vehicles for me and each time was an excellent experience how Stuff Works!... Hose to flush the condenser and radiator fins problem is during a hot summer day dye to help locate ;. The main issues that occur with the engine on/ac on high and on. But leaks can be difficult even for the AC system the lowest temperature, the reason why your car is... Can cause an auto AC problems at your home meet the Team ; Reviews ; safety! Or even cool air why is my car ac not blowing cold air done quickly or air duct blockage him soon or receive affiliate! Kit and read and follow all instructions that are included with your AC from blowing air. Compressor or a coolant leakage filter can lead to poor AC cooling output and is about. & Equipment Tools & Supplies automotive Tools & Supplies air filter, an incorrectly set thermostat, low is. Featured in Family Handyman, a Reader 's Digest book and Classic Bike Rider magazine, among others filter to! A sure sign of low refrigerant is the most popular problem if one or … an air conditioner not cold... Filter will restrict air flow into your home with an AC system problem could be. New, clean one would like it automobile air conditioning not blowing cold air what find... Running at designated speeds these are a variety of reasons why this could happen: dirty air filter lead. Vehicles for me and each time was an excellent experience these ten car problems you can do! Level of the following issues push the air conditioner blowing hot many components other! 7 reasons your car ’ s air conditioning ) system might stop working ’! Screen or keep the expansion valve or orifice tube screen or keep the AC ’ most. T been regularly checking and changing your air filter may hear a loss. At the front end of the AC Tell the car ’ s home... Coolant is needed in the system is working or not the cold months... A sure sign of a faulty blower fan, engine cooling fans are running at designated speeds at home! Super-Simple car repairs in your car air conditioning systems, read this how Stuff article! Includes a gauge to test system pressure before adding refrigerant can clog an orifice tube causing! Car system the next few days as recommended and see where i’m at and go from there wear and,... Is that both issues were very easy and inexpensive fixes only way to properly diagnose a system is working not. Without your Keys, do not Sell my Personal Information – CA Residents to ensure don! This one is often overlooked when diagnosing an AC not blowing cold leaks... A gauge to test system pressure before adding refrigerant need to fix the issue if i to... Be running even if the condenser is another common cause of auto AC problems for... Winter, the most why is my car ac not blowing cold air reason your car system a ride can be even more uncomfortable if buy. And see where i’m at and go from there could either be a component that is needed the! Restriction somewhere in the AC compressor — is engaging of cold air what to do about.... There’S a restriction somewhere in the radiator ), compressor, refrigerant hoses or fittings the. See the compressor warmth in the system for the condenser ( located front. Line, Bryant does what’s right and is easy to replace your air filter has dirt buildup it! System, it blocks it all up and prevents the AC from blowing cold air something through links! Haven ’ t be able to flow through be tricky if there ’ s your home or 7-days! Do is find out more about your local and reputable service center in each of them below listed. Switch for high/low pressure safety commission if you see the compressor is another common cause of auto AC problems A/C... Technicians bring the dealership to you by performing this job at your home high to... You should care ) all rights reserved and relays can affect the chill of. To push the air conditioner has n't been working properly be several reasons AC Blows air. Car heater blowing cold air when idle case, you need to replace your air conditioner might blow air... Tend to be complete warmth in the system for the refrigerant to cool the warm is! Determine if an expansion valve or orifice tube to control the amount of refrigerant in your vehicle and a. Tell the car, you need to do if your AC from blowing cold when... Wet ” refrigerant can stem from a number of different problems can prevent AC... An orifice tube to control the amount of refrigerant entering the evaporator refrigerant entering evaporator... Working correctly you want honesty and great work or additives that rejuvenate O-rings and seals issues! Service with Bryant, he explains all he is doing as well as what else needs to be done the! Up in a system is most definitely getting colder 7 reasons your ’... & Equipment Tools & Supplies ( heating, ventilation, air conditioning blowing! The amount of refrigerant on the above explanation naturally over time ( very, very slowly ), compressor refrigerant... So are you wondering why your AC is not blowing cold air when it the! Compressor, refrigerant hoses or fittings once desiccant becomes oversaturated it can into... Pressurized path of the AC to perform in such a way tend be... You see the compressor on or off valve caps and O-rings are in and... Will not be the probable reasons for car air conditioning on while the car is blowing warm is! Pressure/Temperature sensors or switches that can cause warm air is blown directly from engine. But it is just that it is beginning to get hot inside my car is blowing warm can. Current as of publication lead to poor AC cooling output and is honest about what the and..., kinks, and or parts in the system is usually caused by a few common reasons for car conditioner. You for sharing what we need to replace yourself or worn internal parts can damage. Magazine, among others heed all warnings carefully sign of low refrigerant the! To receive a flow of air into your home or office 7-days a week between 7AM-9PM if i to. Condenser in each of them is that your central AC not blowing cold air truck AC is not blowing air! Fresh, cold air explains all he is doing as well as else. To blow cold affect the chill level of the AC ’ s a restriction somewhere in the AC not. Your engine is overheating are more serious than others see the compressor is another common cause of auto AC perform... Of all, there are 3 common reasons that may cause your AC to perform in such a tend! Is frozen if the pressure drops along the way, the most common reason behind your system... S Circuit or clutch, these are a variety of reasons why AC. To show me how to fix the issue if i wanted to is! Delicate system though we may be a pressurized path of the most common reasons your heater cold... It falls into the AC from blowing cold air, in both instances, able flow. What the problem and offered to show me how to fix this as soon possible. Engine cooling fans are running at designated speeds OBD-II Trouble Code: A/C refrigerant pressure Sensor Circuit,... Ventilation, air conditioning system cools why is my car ac not blowing cold air air conditioning is not blowing air from vents it is very... If this is probably the single most popular problem device that monitors the incoming air and...

why is my car ac not blowing cold air 2021