We will test the pressure and use special dyes to pinpoint the leak. Air conditioning initailly cools , but after about 3 minutes it stops blowing cool air. Two things could be going on here low on ac charge causing the low suction side pressure to go lower then usual causing the ac evap core in the dash to freeze up. Typically an iced over evaporator is the culprit. Stuck & Blend Air Door . Bad ac compressor on car How would I test that. Then rather quickly is stops blowing any cold air and just pushes around ambient temp air. Low car AC charge causes evaporator freeze up and low airflow. When the car is moving, versus stopped, there is more air flow over the condenser (the heat exchanger in front of the radiator) and that airflow is essential to system operation. A fairly common cause of this particular issue is that the expansion coils in the cabin side of the unit get iced up restricting the flow of air across the coils. Your car AC releases warm air when it’s cold and cools the interior when it’s hot. The Fans In Front Of The Engine Attached To The Radiator Will Not Kick On. If we turned the AC off for a few minutes it would again blow ice cubes out of the vents for a few minutes. Please Help! It worked and blew cold air but within a few days to a week at most the air stopped being cold. A condenser has coils and a fan to push the air through the coils and thus cool the refrigerant. Have You Been Changing Your Furnace Filter? At first, your car blows cool air like normal. It is also possible that there is a problem with the AC compressor. For whatever reason, after a while the AC just stops blowing out cold air. Ac will blow cold for awhile and then the compressor..few minutes ac will blow cold for awhile and then the compressor shuts down and blows warm air. Why Does My Car AC Stop Working After a While? The first culprit of your car air-conditioning not giving off cold air when the car idling is the lack of air flow in the condenser. If you turn on your AC on one day and nothing happens, you may be dealing with a major component failure. After driving for a while, the cold air turns hot for an uncomfortable period. Regarding checking the pressure, does that mean I need to recreate by driving this thing an hour? Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as … E: info@genautoinc.com, ©2021 General Automotive Servicecenter, All Rights Reserved. 2. Dysfunctional Thermostat. The condenser fan is towards the front of the grill with the ac is in and working see if the fan comes on or on and off cycles?You will be able to hear it. If your cars AC is still not blowing cold air after a recharge, it’s likely a clog in the system or a faulty part. I have no idea if the condenser fan is working. A low system charge can cause the evaporator coil to so cold that it freezes the condensation on the evaporator fins. Blend air door is the reason for drawing hot air to cold air in your car system. Car is a 2007 Si Sedan with 110,000 miles. What Caused my Vehicle’s ABS Light to Come on. If your AC blows cold initially but then stops being cold after some use, it could be freezing. You start it up and hit the heater. Opening the windows is not helpful because its hotter outside usually. Sometimes it will go out again after 20 minutes and sometimes it will work fine for an hour + ride. And that eventually cools the refrigerant. Top 3 reasons your car’s AC isn’t blowing cold air Top 3 reasons your car’s AC isn’t blowing cold air Car AC isn’t blowing cold because it’s low on refrigerant and the compressor isn’t running. So after the car rests for a while, we get normal air flow and cool. Eventually, it returns to normal. You would need a ac gauge set to measure pressures. Refrigerant Leak There’s also the possibility of having a refrigerant leak, which can be tough to track down since once it’s exposed to air, it instantly evaporates. This part’s job is to force the refrigerant to release cold air before it … The vents blow air just fine but it’s just not cold air. Hi I have a 1999 Ford F-150. After driving for a while, the cold air turns hot for an uncomfortable period. In that case, some joints may leak or lose while operations. 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. With a ac gauge set. I had just finish installing an after market car stereo when it started to do this. You might not think your filter contributes to your AC … The ice builds up until it blocks airflow. If the a/c isn’t blowing cold air when the car is idling, this is an indication that there may be a problem with the AC system high pressure hose. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. I had just finish installing an after market car stereo when it started to do this. An evacuate and recharge. Why your Car AC not Blowing Cold Air after Recharge? Now back home, and A/C seems to work just fine going on short errands. It then feeds that cool air into the engine. 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. It’s freezing outside, and all you want is to get in your car and turn on the heat. 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. Look for oily stains underneath your car, as they may indicate a leak. I got so tired of it that I simply stopped using my a/c. Look for puddles of water under your car—this could be a sign of a freezing problem. Or maybe it it gets cooler, but not cold enough? Opening the windows is not helpful because its hotter outside usually. I can turn the ac button off for a few minutes and then turn it … read more 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. This is especially a problem in humid climates. Gaitherburg (20877, 20878), Germantown (20874, 20875, 20876), Rockville (20847, 20848), Damascus (20872), Darnestown (20874, 20878), Montgomery Village (20877, 20879, 20886), and more. Even something as simple as a cabin air filter replacement can turn into a 3-hour project for a novice. When the ac is inop you will need to measure the high and low pressure readings on the ac system. Per BMW, they are currently testing the A/C Evaporator, as well as the wiring between the temperature sensor for the evaporator and the control unit in the car. What’s wrong with your car? (Long trip back from Destin yesterday. OK. AC systems in vehicles can be tricky and differ from car to car, so we recommend taking your car to your local Gaithersburg mechanic for proper diagnostics and repair. Your vehicle’s AC system consists of a compressor, condenser, evaporator, expansion valve, a series of tubes and several fans/blowers. If you turn the A/C off for some time (5 or 10 minutes) and just run the vent fan, the block of ice will melt, and the A/C can be turned on again and it will work for 5–10 more minutes. Car issues can make people scratch their heads. We stopped several times to have the AC looked at. The Rear Air Conditioner/heater Does Not Work At All. We have found that after a 20-30 minute period while driving on the the highway the air conditioner starts to stop blowing cold air and gradually the air coming out of the vents warms up to a temperature that is just slightly cold but not adequate to keep the car cool, despite putting the system on “maximum” a/c. Intermittent cooling is often caused by the components of your vehicle’s AC system freezing up. Wife’s AC on ’06 Corolla was not blowing cold enough air so I bought A/C Pro recharge kit and refilled the system. 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. Refrigerant level low. The evaporator is likely responsible. Unreliable car heaters can make the cold winter months practically unbearable. Thanks for your input. But what if the air never gets cold? No matter it’s your home ac or the car ac, there is a device named condenser in each of them. The second the pressure switch that controls the ac compressor to turn off and on at certain pressures is reading wrong. It’s best to take your vehicle to an experienced Maryland auto ac repair professional to troubleshoot this problem if you don’t know your way around under the hood. No, your car didn’t get confused and turned on heat by accident. The evaporator is likely responsible. A defective condenser fan. Numerous reasons can cause the compressor to not to connect with the vehicle AC. Here is a more detailed list of the most common causes of a car AC not blowing cold air. Refrigerant can leak for many reasons, including undone welds, loose connections, corrosion, physical damage from road debris, etc. When you shut the air conditioner off, it shuts itself off, or when you shut the motor off, the ice quickly melts restoring function. At our Maryland auto repair shop, we help many customers with AC problems in summer. 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. The Compressor is Unable to Connect. Intermittent cooling is often caused by the components of your vehicle’s AC system freezing up. It happens regardless of whether my car is moving or not. Freezing can also be caused by an oversaturated receiver/drier or accumulator. R134a levels are at normal and the condensor and motor appear to be in perfect working condition. No matter it’s your home ac or the car ac, there is a device named condenser in each of them. Turning the system off for a while and letting it thaw will temporarily solve the problem. After about 40-45 minutes the air stops blowing and its not as cold and sometimes not cold at all. I hit the max AC button and I can hear the blower working really hard, like it should be, but there is only a small trickle of air coming out and its not that cold sometimes its even room temperature. When its acting up we need to check the high and know pressures also is the condenser fan working? The light on the controls is still on and seems to be running. Plus a scan tool that that read the pressures of the pressure switch on the screen. Maybe the fan is malfunctioning. 95,000 MILES. That could be a reason to make your car ac not blowing cold air consistently. And to give you a few ideas on what could be wrong with your car, here is a list of some common car AC problems and their possible causes. If either one of these components fails to do their job, it may result an entire system failure. After about an hour, A/C gradually blows less and less cool air. A condenser’s job in a vehicle is to cool the warm refrigerant that was used to make the air cold in the evaporator. However, you need to know that the air conditioner does not produce cold/cool air, it absorbs heat and moisture and leaves cold air. Here is a more detailed list of the most common causes of a car AC not blowing cold air. I told my kids it reminded me of my youth, 9 of us in the wood paneled station wagon, windows down, Mom and Dad smoking cigarettes, nobody in seat belts.). The main issues that occur with the car’s air conditioning system are due to poor maintenance. If the air flow coming in reduced to almost nothing after driving a long period I would suspect the evap core freezing up but if just isn't blowing cold that would need some diagnosing. Perhaps your temperature gauge is … I just replaced the cabin filter with a brand new one but the problem still remains. A small refrigerant leak is the most common reason a car’s A/C gradually … After stopping the car and turning motor off the air will come out cool again for a few minutes then it the air coming out of the air conditiner becomes warm again. Site Designed and Developed by: Advantage Internet Marketing | Credits. I may have to shut down the truck for it to start blowing cold again. 2. This condenser has … Excess air and moisture in the system may lead components to freeze (literally). This condenser has cooled and fans to push the air through. Drove down and back from Destin, about 7 hours each way. A fairly common cause of this particular issue is that the expansion coils in the cabin side of the unit get iced up restricting the flow of air across the coils. If I turn off the AC switch and let it sit for about 5-10 minutes and turn it back on (can hear the compressor kick on) it will blow cold air again … Now sometimes I turn the a/c on and it will run fine for a while until it randomly stops blowing cold air. Maybe you hit it. Ac isn't always the easiest diyer repair and diagnoses. Typically an iced over evaporator is the culprit. What you can do is check whether the electric cooling fan that sits beside the condenser is running. The purpose of the high pressure hose is to increase and decrease AC pressure during different driving conditions. The air would blow very cold for a few minutes, Then it would blow regular non-cooled air. 7631 Airpark Rd I had the A/C system evacuated and charged with Freon, It wasn't low we recovered 1lb 2oz and put back in the same amount. What Happens When Car AC Stopped Blowing Cold Air? I Have A 1999 Chrysler Town And Country That The Air Conditioning Stopped Blowing Cold Air Even Though The System Is Fully Charged. If you notice that your thermostat gauge stays on the “C” even after the … It contains several joints for better rigidity and performance. It may start blowing cold again after awhile, but not always. If there is something wrong with the condenser, the hot air from outside will just blow through the engine and out the AC. At General Automotive, we can fix your car fast and at an affordable cost. The cooling fan in the condenser is the first thing that you should look … For example, if the evaporator blower motor burns out, you will get little to no airflow through the vents. To maintain airflow when the car is in stop and go traffic, or is completely stopped, condenser fans will come on … The main issues that occur with the car’s air conditioning system are due to poor maintenance. The condenser, while looking like a radiator, acts as a cooler on the ambient temperature that blows through the car. As you get in your car and turn on your AC, you probably expect it to be blowing hot air for the first minute or two until the system cycles through enough to cool it. Like any other component, it can get faulty and break down and even stop to work. There may be numerous issues causing the icing—from a dirty cabin air filter to a blocked evaporator drain or an overcharged system. If the condenser coils get dirty or clogged, or if the fan fails, the refrigerant won’t be cooled completely, so the air will come out warm. Now sometimes I turn the a/c on and it will run fine for a while until it randomly stops blowing cold air. You can even cycle the A/C on and off every few minutes to prevent the icing from getting very far each time. So you went for a road trip or a long drive, and after 30 minutes of driving realized that your AC suddenly stopped working or switched to blowing warm air. This part’s job is to force the refrigerant to release cold air before it … The light on the controls is still on and seems to be running. AUTOMATIC. And you wait — and wait — but the heater just blows cold air. The cold air returns shortly, and the cycle repeats itself for as long as you are driving. Its job is to cool the warm refrigerant, and that makes the air cold when it reaches the evaporator. There is likely a problem with your condenser. I got so tired of it that I simply stopped using my a/c. A refrigerant is a fluid that is transformed from liquid to gas and vice versa in a … The service stations ALL did the same thing. Your car’s AC is a closed system. Stuck & Blend Air Door. Give us a call today or contact us online to schedule an appointment. Air flow reduced to almost nothing! In addition, none of the car's diagnostics pick it up. Two things could be going on here low on ac charge causing the low suction side pressure to go lower then usual causing the ac evap core in the dash to freeze up. An evaporator covered in ice can’t cool the air, so you would have to wait until the ice melts, which is why the cold air eventually returns. I have added R134a refrigerant and saw the compressor begin to engage properly. Hi my 2002 Honda Civic LX 2DR A/C stops blowing cold air after 20 minutes, If I turn it off for a few minutes it will works fine again. 2. I was thinking this fact pattern had a potential known diagnosis. My AC will stop blowing cold air after driving for about 15-20 minutes. This is especially a problem in humid climates. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. My AC will stop blowing cold air after driving for about 15-20 minutes. The second the pressure switch that controls the ac compressor to turn off and on at certain pressures is reading wrong. It happens regardless of whether my car is moving or not. If you suspect a refrigerant leak, take your car to General Automotive. If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. AC Orifice Tube / Expansion Valve. The AC orifice tube / expansion device filters and regulates the … If I turn off the AC switch and let it sit for about 5-10 minutes and turn it back on (can hear the compressor kick on) it will blow cold air again for another 15-20 minutes or sometimes less. At first, your car blows cool air like normal. A few years ago my AC stopped working. Also, at times I can turn off the AC and turn it back on in a few minutes and it will blow cold again. What Happens When Car AC Stopped Blowing Cold Air? And, when it senses any issue, AC is the first thing to get shut-off. An evaporator covered in ice can’t cool the air, so you would have to wait until the ice melts, which is why the cold air eventually returns. A Leak in the A/C System. Maryland may not be as brutal as Texas, but getting through your day without a working air conditioner in your car is still a huge inconvenience. This door is located in the ventilation system. As we know, AC connection of a car is done with the wire that is not connected straight. 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. They Work As When You Directly Attached To The Battery They Run.... My Ac Is Not Blowing Out Cool Air. Eventually, it returns to normal. My AC will blow cold, then start blowing ambient temp air. So, make sure that you check the compressor as it could be the reason why car AC not blowing cold air after recharge. What Car Repairs are Covered by Insurance? Many of the AC system components are located underneath your vehicle’s dashboard and can be difficult to get to. To compare what the gauges are reading. Gaithersburg, MD 20879 Check whether the electrical connections for the condenser fan is connected and seated firmly. But there are many metal to rubber hose connections that are sealed with special O-rings and gaskets. This is often the case. The AC is now cold but only when the car … After about 40-45 minutes the air stops blowing and its not as cold and sometimes not cold at all. Then the AC system shuts off … You would need a ac gauge set to measure pressures. There are many reasons your car's heater isn't working. Took It To A Mechanic And He Stated Its Not Working Bc The Rear Air Conditioning Condenser Has A Leak. Most modern vehicles also have safety mechanisms that may prevent a component from engaging if the pressure is low in the system due to a refrigerant leak. Why Does My Car AC Stop Working After a While? 1. P: (301) 926-4600 The amount of hot air and which direction it blows are controlled by the buttons and switches on your dash, which direct the heater valves and the car’s blower fan. Blend air door is the reason for drawing hot air to cold air …