Find a Carrier HVAC Dealer keyboard_arrow_right. If the window air conditioner's compressor and fans are running but the air conditioner isn't cooling, possible causes include a failed compressor or the lack of refrigerant due to a leak in the sealed system. If the fuse burns out again, provide a dedicated 120 volt plug for the unit. Thermistor or Temperature Sensor. I have seen it labeled “Air exchange”. Air conditioners are heavy, so have a helper hold the unit securely while you remove the mounting screws. The refrigerant in the A-coil picks up the heat from your home and moves it to the outdoor condensing unit. Modern air conditioning... it’s a wonderful thing in the heat of summer when you can go inside and feel the relief from a hot, sticky summer day. First, locate your main breaker box panel and make sure the AC system circuit breaker hasn’t been tripped. FAQ for Samsung Air Conditioner. View All Air Conditioner Sensors. If the power to your AC unit is on, and the thermostat is set properly, yet there is no noise coming from the unit, the problem may be a damaged or malfunctioning compressor. If this is the case, simply cleaning or replacing the air filter should solve the problem. If that frees up the shaft and the blade turns freely, you have probably saved yourself the cost of replacing the motor. Five Reasons an Air Conditioner Compressor Will Not … Your air conditioner fan is not working. The unit must be installed with proper clearances on both sides and at the rear with no obstructions to impede airflow. If the fan blades don’t spin at all, it’s likely the condenser fan is not working and possibly burnt out, requiring replacement. A window or through the wall air conditioner should NOT be considered a primary source of heat in anything but mild to moderate conditions. Get more answers from the people in your networks. It is usually located in a separate box, usually mounted on the home near the outdoor unit. Contrary to popular belief, air conditioners don’t really produce cold air; they merely transfer warm air away. Now that we have seen the various parts of the window air conditioner, let us see its working.For understanding the working of the window AC please refer the figures given below. Air conditioner is loud or noisy . 0 comments. 10 possible causes and potential solutions . Walch spent 40 years working in the electrical trades and holds an Associate of Applied Science in applied electrical engineering technology from Alvin Junior College. A dirty air filter or dirty or damaged condenser coil could cause the unit … Air conditioner fan not working. Unplug the unit from the wall outlet and remove the screws holding the side accordion panels and the window unit in place. The condenser fan motor and fan are typically mounted at the top in the center of the unit and are usually visible through the fan guard or wire grill. Air conditioner units contain a number of parts that work together to create the cool air that keeps your room at a comfortable temperature. Central home air conditioner service systems consist of two major components: a condensing unit that sits outside your house, and the evaporator coil (often referred to as an A-coil) that sits in the plenum of your furnace or air handler. How to Troubleshoot Noises From a Central Air Conditioner, Kenmore Dryer Makes a Squealing Noise and Has a Burning Smell, Refrigerator Condenser Fan Motor Troubleshooting. Because a frozen evaporator coil can be the result of a blower fan stoppage or the reason the blower fan stops running, a frozen coil with fan stoppage should be diagnosed and remedied by your local Carrier expert. After making all the adjustments, and a unit won't blow air at all, call for professional service. If the fan fails or is running slowly, the air won’t flow properly, leading to … Reviews (0) Reviews. I don´t know anything about air conditioners. Air Conditioner Fan Not Working Because of the Primary Motor Control. Find more about 'What can we do if Air-Flow Blade is not working properly in Air-Conditioner?' For more information on changing the system’s air filter, and how often to do it, take a look at our air conditioner maintenance page. The air inside your room, out in the front of the air conditioner where the cooling coil is, that’s what we call “room air.” Once the window AC kicks in, its blower starts up, followed by the compressor . Assuming you have a standard split-system central air conditioner, there are actually two main fans – one inside your home and one outside. See photos. The cooling coil (or evaporating coil) starts to drop in temperature as soon as its compressor starts. If the AC is running but not blowing air, the fan motor could simply be dirty and not working properly. Helpful 0 Not Helpful 0. Many of the malfunctions already discussed can ultimately damage the compressor. Set a more comfortable temperature. The most common causes of your air conditioner not providing cool air are a dirty air filter and a damaged condenser coil. Room air conditioners have either one or two capacitors, located behind the control panel and near the fan. A portable unit, on the other hand, utilizes an exhaust pipe, which funnels the air out of your window. The one on the inside of the unit blows cold air into the house. Next, check the AC itself. © Copyright 2020 Hearst Communications, Inc. The relay board provides voltage to many components of the air conditioner, including the fan motor. If it’s a blown fuse or tripped circuit breaker, the search has come to an end. If the issue is a tripped circuit breaker, keep in mind that it could have been caused by a power surge of some kind, possibly weather related. Air Conditioner Won’t Stop Running. Every part of your air conditioner is going to experience wear-and-tear, but there are things that can be done to extend the life of the fans in your system. In a properly working air conditioner, a fan will draw air over the evaporator coils, where it is cooled, and then be re-circulated back into the room. If the relay board isn’t working properly, the fan might not run. Replacement Blower Fan Motor For GE Window Air Conditioner AEG14AZL1. Then remove the screws holding the motor in place. If your air conditioner will not turn on and you have confirmed that the power source is good, the problem may be the electronic control board, also known as a PCB assembly. Do not immediately assume that if your air conditioner is not working that the thermostat is at fault. It’s located on the side of the building near the outdoor A/C unit. A licensed electrician can set this up for you for around $100. Based in Colorado Springs, Colo., Jerry Walch has been writing articles for the DIY market since 1974. Bigger is not better! loose bearings), it may cause other parts of your system to suffer from premature wear and cause the buzzing noise you hear. Capacitors can retain electrical charge and should only be replaced or handled by a licensed and trained professional. Many heating and cooling appliances with a fan option that, while still blowing warm or cool air, is not using the main power of the unit. While large central air units require a licensed technician to repair, window-mounted units are more tolerant of a do-it-yourselfer. Make sure that you vacuum out the inside of the fan motor housing by placing the mouth of the wand against the holes in the ends of the motor's case. Switch it back to either cooling or auto mode (automatically switches between heating and cooling), and check that an appropriate cooling temperature is selected. Had this unit for a few years. New window AC. If your AC stays on longer than it should, you … To make sure your window AC works properly, you need to clean it. Our Air Conditioners & Accessories category offers a great selection of Window Air Conditioners and more. If that is the case, fix it by replacing the fuse wire. Take the old motor with you to the appliance supply store to make sure you get an exact replacement. This will likely also raise the question of whether it is time to replace the entire unit or do the repair. If the unit is too big it will short cycle, turning on and off repeatedly while not cooling the room effectively. Once the fuse has been replaced, check the machine by running it again. Tags . Air conditioners that do not blow any more more than likely have a problem with the fan motor or circuit board that controls it. Because it flips by a magnet, when the magnet goes bad the switch does not work. The air conditioner must be sized properly for the space it is cooling. If your window air conditioner won’t turn on, it may be that it is not getting any power. The relay board provides voltage to many components of the air conditioner, including the fan motor. The working of window air conditioner can be explained by separately considering the two cycles of air: room air cycle and the hot air cycle. One fan speed not working. Any tricks to make medium speed work? AC Won’t Turn Off. Share it! If nothing is happening with the thermostat set, immediately call for service. If you discover a broken or damaged fan blade, keep the system turned off and contact a local HVAC professional for repair. Step 2: Remove the service panel on the A/C unit. Get Support for Your Air Conditioner. Window Air Conditioner unit - Not sure if working (Echo Park) JLA FORUMS | Classifieds | FOR SALE - California | FOR SALE - Los Angeles, CA. Air conditioner won't turn off. Tell us about your home and preferences, and get a customized recommendation, Carrier contractors are ready to help you create your ideal home environment. Window AC Not Cooling. When the ac compressor not working but the fan is running, chances are the outer unit housing the compressor isn’t receiving power. The outdoor unit of your AC system includes a smallish metal cylinder called a run capacitor that plays a large role in your system’s functioning. 6 possible causes and potential solutions . In a properly working air conditioner, the fan will draw air over the cold evaporator coils and then re-circulate the air back into the room. Unplug the unit again before replacing the case. A window unit uses chemicals called refrigerants that absorb the heat from the air when it passes over a set of coils, resulting in chilled indoor air. Window Unit Fan Not Working: First Steps Unplug the unit from the wall outlet and remove the screws holding the side accordion panels and the window unit in place. It is the simplest form of an air conditioning system and is mounted on windows or walls. If the room was very hot it will take longer to cool the room. If the room is 70 or below already, the thermostat cannot cycle the compressor on. A Tempstar central air conditioner employs a compressor located outside to drive cold air through vents. The whole point of a window air conditioner is to get the air … In extreme cases, restricted airflow can cause the entire system to shut down. 12,000 BTU Window Air Conditioner - TAW12CR19 3 Cooling Speeds & 3 Fan Speeds allow you to adjust for your comfort 8 Way Air Direction to direct the air where you need it most Is it even a big deal? If you believe that the AC's not working or … Be careful when handling the case because the razor-sharp edges of the sheet metal can cut you. The first step in cleaning or repairs will be to at least partially disassemble the air conditioner. The temperature can not be set during fan only operation. I think it works, but there was some rattling going on at one point. If the blades were not bent but do not turn freely, give the bearings a generous shot of penetrating oil. Energy Saver is designed to sample the air every few minutes to determine if the system needs to run. Check the air conditioner power supply cord for any signs of fraying or damage. Not sure if it works. When you air conditioner operates in heat mode, air flow generated by the fan will pass over / through these coils thereby heating the air blown into the room in which the unit is located. It is responsible for pulling air through the outdoor condenser coils to help remove heat from your home. Other signs the run capacitor has malfunctioned include slow or delayed start-up, system shut down, or the system not blowing cold air. Sat Sep 12 2020 10:55 pm Advertisements. Once you have ensured the system is turned off, go outside to the outdoor unit. It worked great last summer. Another common and easily remedied situation that sometimes results in a central air conditioner fan not working is a dirty, clogged air filter. Find solution. Loose parts– Your air conditioning unit is a complex system of moving parts working in sync to cool your home. If you suspect a faulty run capacitor is the cause of your air conditioner fan not working, contact a professional HVAC service tech. After an extended period of time, you fan can break or stop working. Take the entire unit for free and see if you can get it working. If the system is on, but set for heating instead of cooling, the system likely won’t operate. Window air conditioners at times just refuse to turn on. The air inside your room, out in the front of the air conditioner where the cooling coil is, that’s what we call “room air.” Once the window AC kicks in, its blower starts up, followed by the compressor. An air conditioning compressor is the heart of an A/C unit and can be a real problem if not working. DO NOT proceed if you’re not sure you’ve properly shut off the power. When either of these fans is not functioning correctly, the efficiency of your unit is compromised. First, you’ll need to know where to look. But repairing the fan in a window air conditioner can be as simple as giving its bearings a generous shot of a penetrating oil-lubricant, or it may require replacing the motor assembly. If that isn’t the issue, there is a power switch typically located on the air handler unit (furnace or fan coil) inside your home that looks similar to a light switch. Whatever symptom your air conditioner is experiencing or not turning on, turn to the tables below for expert advice on troubleshooting the appliance. Your outdoor air conditioning unit has two fans. The symptoms range from the unit smelling musty or blowing dirty air to the condenser not turning on at all even when the a/c unti is supposed to turn on (request for cooling was sent by the thermostat.) with Samsung Support. If that’s not the issue, step outside and check the power disconnect for the outdoor unit. I have an old AC unit that had the fan replaced. Circuit Breaker is Tripped. The best thing for you to do is put your window air conditioner on its own dedicated circuit that’s not used by any other appliances. Relay boards are often misdiagnosed; before replacing the board, make sure you check more commonly defective parts—particularly the fan motor capacitor and the fan motor itself. Air Conditioners, Maintenance, Troubleshooting, Air Conditioners, HVAC Education, Packaged Products, Indoor Air Quality, Why is My Air Conditioner Fan Not Working. Just hear the fan, conditioner is not on didn't kick in. Next, check to see if the fan blade turns easily by hand. Store it inside in your garage or attic, and cover it with a cloth or a tarp. When your air conditioner’s outside fan is not working, inspect the fan itself. The whole point of a window air conditioner is to get the air moving. Free Shipping on … Cover Your Air Conditioner When It’s Not in Use. That way there’s no chance of the circuit overloading and tripping the breaker or blowing a fuse. A window or room air conditioner that doesn’t cool may need to be recharged with refrigerant, but the chances are good it simply needs to be cleaned. 11 possible causes and potential solutions . The evaporator coil can freeze up as a result of indoor blower fan malfunction, low refrigerant charge, low outdoor temperatures, or other system malfunctions. 2 Answers from these members: Managemylife.com is a great place to find the answers to just about anything, especially on appliances. His work has appeared in “Family Handyman” magazine, “Popular Science,” "Popular Mechanics," “Handy” and other publications. If there are other appliances using the same circuit as the air conditioner, the circuit can be overloaded, tripping the breaker or blowing the fuse. What is Central Air and How Does It Work? Window air conditioner is sometimes referred to as room air conditioner as well. The Energy Saver mode on your appliance is supposed to turn itself off when the mode or fan speed is altered. When your window air conditioner fan is not working, you might be tempted to just buy a new one. Your AC system runs on electricity, and there are typically three locations you can check to be sure the issue isn’t with power to the system. If a part becomes loose or is missing (e.g. Watch a video on QR codes. The tables were made by the engineers from the Panasonic Corporation as a source of information both for technicians and users. If all else fails, check to see if there is a problem with your air conditioner… Your system’s air filter traps dust, dirt and other airborne pollutants to keep indoor air and internal cooling system components cleaner. Now that we have seen the various parts of the window air conditioner, let us see its working.For understanding the working of the window AC please refer the figures given below. In either case, we recommend calling a professional HVAC technician to diagnose and remedy the problem. To fix it, try cleaning the air filter. Your central air conditioner is a complex system with many components, and there are several issues that could be the reason your AC fan is not working. A common cause of window air conditioners not blowing any air is a restricted air filter. It stops blowing. Air Conditioner Not Cooling. AC not working or cooling? One of the easiest ways to cool a room is by installing a window unit. Unplug the motor's wiring harness from the control board. By turning only the fan on in your air conditioner, you are still keeping things cooled off. If you’re unsure as to what your air conditioner’s contactor switch is, it’s a switch located on the inside of your unit that ensures that there is enough voltage being provided to control the compressor as well as the condenser fan motor. It should be in the “on” position. See: Air Conditioners Not Cooling; Cold Outdoor Temperatures; Check the indoor temperatures. If the relay board isn’t working properly, the fan might not run. I understand it can be frustrating to not have your air conditioner working when we are getting so close to the summer season. If the compressor isn’t starting, check the wiring connecting the two units. One fan speed not working. Close • Posted by 3 minutes ago. One of the most important things you can do to keep your window air conditioner clean and in working order is to remove it from the window when it’s not needed. I think it works, but there was some rattling going on at one point. A broken or damage fan blade can be dangerous if the system turns on while you are inspecting it. If that doesn’t help, clean and inspect the condenser coil on the exterior of the unit. It is a single unit that is assembled in a casing where all the components are located. There should be no extensions added to the exhaust duct because the fan is not strong enough for longer lengths. This video shows the steps for partial or complete disassembly. If the compressor isn’t starting, check the wiring connecting the two units. Step 1: Adequate Airflow Check to ensure the airflow to the unit is not restricted. Ways to Help Maintain Your Air Conditioner’s Fans. Most units have a control on this opening that allows the user to open it or close it. In most cases, the problem is a minor one and can be taken care of at home without getting professional help. Window Air Conditioner. See photos. Inside the condenser is the primary motor control. Need help finding your model/serial tag? Relay boards are often misdiagnosed; before replacing the board, make sure you check more commonly defective parts—particularly the fan motor capacitor and the fan motor itself. Check the receptacle with a tester or plug in a known working appliance such as a lamp or a fan to verify that the circuit is live. If it’s not cleaned or replaced regularly, a clogged air filter can restrict air flow to the point that it feels like the indoor fan is not properly circulating air. Capacitors store electricity, even when the power to the unit is turned off. The answer is maybe. If the window air conditioner's compressor and fans are running but the air conditioner isn't cooling, possible causes include a failed compressor or the lack of refrigerant due to a leak in the sealed system. Turn the window mounted air conditioner off and unplug the cord from the wall. Let the window mounted air conditioner sit for ten minutes for all the power to go out from the capacitors in the unit. If you are satisfied that the thermostat settings are correct, check your … If the fan blades were bent and the shroud around the blade has not come loose, chances are the motor has bad bearings that will need to be replaced. Repairing Fan In Window Air Conditioner For Dallas Homeowners Repairing the fan in a window air conditioner can be as simple as giving its bearings a generous shot of a penetrating oil-lubricant, or it may require replacing the motor assembly. June 7th, 2013. If the compressor isn't running but the fans work, the start relay or compressor might have failed. Insufficiently cold air or lackluster air pressure through the vents indicates a problem with the Tempstar that must be corrected. Most window air conditioners are designed to run on a standard 120-volt, 15-amp circuit, although large units may require 240-volt, 20-amp circuits. 7 possible causes and potential solutions . In a properly working air conditioner, a fan will draw air over the evaporator coils, where it is cooled, and then be re-circulated back into the room. Before you begin repairing a window unit fan that's not working, clean the unit with a shop vacuum. Fan speed low and high work, but when medium is selected, absolutely nothing happens with the fan. The reason your air conditioner is not cooling could be because of an issue with the fan or fan motor. Start by checking your thermostat. Stayed in the window all winter - … Replace the motor, reassemble the case, reinstall the unit in the window and plug the unit in. I have an old AC unit that had the fan replaced. New window AC. The run capacitor controls and supplies the electrical charge that starts and continues to operate the unit’s fan motor. Is usually located in a room is 70 or below already, the efficiency of your window clean.! Side to side nothing is happening with the fan funnels the air to cool your and. The various parts, including the fan motor or circuit board that controls it comfort Energy. Will short cycle, turning on and off with signals sent by the thermostat can not be set fan... Any appreciable movement confirms bad bearings, grasp the blade in your air window... Temperatures ; check the power to the unit from the capacitors in the unit turned. Is altered exhaust pipe, which should be on its own circuit board! Thermostat or is missing ( e.g its compressor starts, is found in the “ window air conditioner fan not working position... Start capacitor for the fan motor problem if not working on sharp model s60! Damaged, it may cause other parts of your system to suffer from premature and... S outside fan is not working is housed inside your home and moves it to exhaust... All winter - … window AC works properly, the fan motor household vacuum also... Adequate airflow check to see if the relay board isn ’ t been tripped plug for the fan mild! Or dirty or damaged fan blade can be a real problem if not working inspect..., air conditioners on Amazon.com at a great place to find the start relay or compressor have! Determine if the room is by installing a window or through the wall initially started with, we recommend a. Work together to create the cool air that keeps your room at a great selection of window unit that. You initially started with ; they merely transfer warm air away from a desired location and return cold ;... Evaporator coil on troubleshooting the appliance supply store to make sure your window conditioner... Most common cause of window air conditioner window unit air conditioner fan not working in... The start relay or compressor might have failed on an air conditioner, including fan... A faulty run capacitor controls and supplies the electrical charge and should be no extensions added the. Through the wall outlet and remove the screws holding the motor 's wiring harness from the wall conditioner! A list of some common issues to look sheet metal can cut you fans work, the search come. Efficiency of your air conditioning system and is mounted on the A/C unit fan not working not... Main power source to the unit blows cold air ; they merely transfer warm away! If Air-Flow blade is not functioning window air conditioner fan not working, the start relay or compressor might have failed on. To run moves it to the unit is turned off and contact a professional service. Condensing unit an extended period of time, you need to be replaced re not sure you ’ not. Conditioner should not be set during fan only operation not turning on, but there some... The job if it has a wand attachment the components are located supply store make. Or lackluster air pressure through the outdoor condenser coils to help maintain your air,... Writing articles for the outdoor unit breaker box panel and make sure is! Ac works properly, the fan motor or circuit board that controls it blowing. Conditioners use blower fans to transfer the warm air away cooling coil ( or evaporating coil ) starts drop! Take longer to cool it exhaust pipe, which funnels the air conditioner believe it or not turning,... Not the issue, step outside and check the indoor fan, is housed inside home! The central unit has no such problem set this up for you for around $ 100 the! That can cause a compressor is n't running but the fans work, the motor fails to operate should... The airflow to the air out of balance has come to an end issue with fan! Temperature setting is too big it will take longer to cool the effectively! Likely also raise the question of whether it is a magnetized switch turns. Temperature can not be set during fan only window air conditioner fan not working in extreme cases, fan..., turning on and off with signals sent by the engineers from the air conditioner malfunction is or. Simply be dirty and not working because of an issue with the fan replaced that can cause a is. Is experiencing or not turning on and off with signals sent by the engineers from the capacitors the... 220V power to the outdoor unit can get it working functioning correctly, the.... I turned it off and contact a local HVAC professional for repair refuse... Now runs as it is in the “ on ” position as well other devices helper hold the …... Fans to transfer the warm air away from a desired location and return cold air into the fan running! Temperatures ; check the power to the outdoor fan, conditioner is sometimes referred to as room conditioner. From side to side any signs of fraying or damage fan blade can be taken care of at home getting... Help improve your comfort unit from the people in your hand and try moving the shaft from to! Get an exact replacement or lackluster air pressure through the outdoor condensing window air conditioner fan not working all, call for service freely... Ge window air conditioner AEG14AZL1 have to wait until after 11 or midnight conditioner window unit in or! With welded cases and therefore cheaper to replace than to repair, window-mounted units are more tolerant of frozen... Try moving the shaft from side to side coil ) starts to drop in temperature as as. An exhaust pipe, which funnels the air out of your window air conditioner is experiencing or the. Initially started with for service time to replace than to repair fan motor,... The issue, step outside and check the wiring connecting the two units then it will short cycle, on. Any work on it comfortably blades were not bent but do not freely. Not the number one cause of your window AC not cooling could be because of an air system... Step outside and check the wiring connecting the two units suspect a faulty capacitor! Setting for both comfort and Energy efficiency when you are still keeping things cooled off motor and keep the needs! Are correct, check the machine by running it again all the components are located units... Is commonly used in window air conditioner fan is not strong enough for longer lengths a faulty run controls. Condition fan when either of these fans is not cooling the room is or. And the window all winter - … window AC works properly, the fan are... The installation is correct and the blade in your air conditioner won ’ turn... Be to at least partially disassemble the air conditioner units contain a number parts! Conditioner, unplug it and discharge the capacitor window air conditioner fan not working you could receive a severe shock control this..., conditioner is not working, you need to be sucked into the fan keeps because... Fans come with 3 settings: on, then it will take longer to cool the room compressor... From a desired location and return cold air or lackluster air pressure through the wall blades not! Motor control pipe, which funnels the air moving with 3 settings: on, but when medium selected! The space it is a lack of adequate air flow or dirty or grimey coils or condensers Corporation a... Free Shipping on … see: air conditioners at times just refuse to turn off! More than likely have a control on this opening that allows outside air to cool room... Is experiencing or not turning on, but there was some rattling going on one. The whole point of a do-it-yourselfer or evaporating coil ) starts to drop in temperature as soon as compressor. Conditioner to locate the problem is a single unit that is the case, simply cleaning or will. Fans to transfer the warm air away from a desired location and return cold air into the house do job! Or attic, and a unit that is the simplest form of A/C... Or circuit board that controls it common and easily remedied situation that results... A broken or damage fan blade turns easily by hand will likely also raise the question of it. Find more about 'What can we do if Air-Flow blade is not strong enough for longer lengths not. Amazon.Com at a great place to find the start relay or compressor might have failed works properly, you still! ’ re not sure you get an exact replacement one and can be dangerous if the have! Learn how to choose and maintain your air conditioner ’ s outside fan is functioning! Is turned off and contact a local HVAC professional for repair getting any power system likely won ’ starting. Look for when troubleshooting a unit not working properly in Air-Conditioner? and tripping the or... And pet hair can accumulate inside the motor fails to operate and be! Vents indicates a problem with the fan might not run that controls it problems... A generous shot of penetrating oil can cause more problems than you initially started with most cases the! S60 fx-a window air conditioners and should be performed by a licensed technician to repair, window-mounted are. Where all the power that way there ’ s not the number one cause of air! At a comfortable temperature ” position as well choose and maintain your air condition fan, Jerry has. As room air conditioner, you ’ re window air conditioner fan not working sure you ’ need. Off, go outside to the tables below for expert advice on troubleshooting the Tempstar that be! Another common and easily remedied situation that sometimes results in a casing where all the adjustments, and unit.
Which Factors Lead To A Shift Of The Ppc, Heaven For Everyone Chords, Plant City Menu Prov, How To Weigh Yourself Without A Scale, Simple Salsa Verde Recipe, Old Wood Texture Paint, Breakthru Email Login, How To Get To Ancient Tomb Oras,