I have a standing fan.When I turn it on,the motor hums,and the blades want to turn,but they won't.Could it be dirty?I have silicon spray,and Wd40,but have done nothing so far.Any suggestions as to what may be wrong and how to fix it?.Thanks. then it's probably the capacitor connected to the motor, and if it doesn't blade cage. If it hums and turns freely but doesn't run, the fan continues to run even after switching off the air conditioner. Blower motor stuck on one speed. WD40 is excellent for loosening stuck parts, but it's not the best for If that isn’t the case, it could mean the motor bearings need to be oiled or that the capacitor is failing. When the fan doesn’t start even though the AC is turned on, it can be a clear sign that there’s a fault with the motor. Hi sir. If the AC fan motor is bad or the capacitor is faulty, you should always contact an expert HVAC technician to repair or replace parts. Press the center cap into place, plug the fan in for a brief moment and test it. I was expecting to take the motor apart (via the four screws holding the To investigate, I disconnected the motor (12v 200W 3000RPM) from the rest of the circuitry and applied the 12v current directly. For instance, after a long winter, especially a rainy one, moisture or rust can build up in the fan unit preventing the blades from turning. Turn your fan on to make sure that the motor works. to spray some WD40 onto the front bearing. Build up of dust particles could cause the fan to slow down or even stop. Step 2 Lay the fan down on a flat surface with the exposed face up. When was the last time you replaced the AC unit’s air filter? HVAC technicians are equipped with an infrared temperature gun that can read the unit’s temperature without having to touch the hot surface. If you hear a loud rattling noise, it could be a minor issue like loose stones or debris that’s caught in the condensing unit. bearings, both front and back, and put it back together. As part of a routine maintenance visit the technician will inspect the condenser unit, clear away any dirt or leaves that have accumulated on or around the unit, check the fan and, if necessary, clean the fan motor and oil the bearings. All you need is a screw driver, a small pick, and some lubricant. Plug your fan in and turn it on to the highest power setting. In this instructable, I repair my GPU fan. This immediately allowed the shaft to turn freely. If something gets stuck in the evaporator fan motor’s blades as it spins, it can stop the motor and potentially damage it. So check that first before throwing If there is a C-clip, pry it off first. This is a very useful and helpful tips by you. Bath fans vary in design, but motor replacement requires the same basic steps, no matter which brand or model you have. Once this happens, your air conditioning unit is at risk of suffering more serious damage. Wiring within the motor housing can also cause failure. The non-detergent specification is extremely important, because the addition of a detergent element to the oil is what will cause the bearings to become clogged up and stuck. How to Repair a Computer Fan: If you have a computer fan that sounds like the bearing has been replaced with gravel, there may actually be a simple fix. If you’ve ruled out the above problems, it’s time to head outside to the condensing unit. So I added some 3-in-1 household oil to the slow, until eventually it just hummed, with the blades hardly moving. -- A very common failure However, there are some preliminary steps you can take to rule out other possible causes for your AC not working and confirm that the problem is, indeed, with the AC fan motor. If the thermostat isn’t the issue, the most likely problem is a stuck relay switch. Never try to remove or fix the capacitor yourself. The motor could be overheating which causes it to cut out. If your fan motor is a 120V, it will most likely have four colored wires (black, blue, red, yellow, etc. The refrigerator condenser fan plays an essential role in the refrigeration cycle, but not all refrigerators have one. Maybe 6 months ago, blower fan speed 5 stopped working, followed by the rest shortly after. Nor do you wish to. You want to find 10, 15 or 20 weight non-detergent motor oil. Over time the chain attached to the switch can jam , keeping you from pulling it. Refrigerator Condenser Fan Motor Troubleshooting. The fan motor is a fairly uncomplicated yet vital part of an air conditioner. There is more than one possible cause for a noisy air conditioner. If the compressor is working but the fan blades are not spinning, the motor is faulty. Many homeowners neglect this basic maintenance task. In order to eliminate "The motor is disconnected" alarm from the controller, I completed the circuitry with a small fan (5v -12v). There are also other factors which greatly affect the performance of electric motors such as low resistance, dirt, moisture, over-current and vibrations. Motor Is Jammed. Replacing the thermostat will have it up and running again. However, a pinched or damaged wire within the power cord can cause intermittent or complete fan failure. With the information you have provided, the HVAC technician will take the following steps to confirm the problem. Sometimes the reason an air conditioner is not working is as simple as a tripped breaker. Some motor plates release by pressing or prying on the side of the fan housing. So I opened it up. If the air filter is clogged, replacing it with a new one should get the air flowing freely and strongly again. and the blade doesn't spin freely, then the problem is a seized bearing Most maintenance plans include biannual HVAC tune-ups. If, however, you’re mechanically-inclined and interested in learning some basics about how an AC functions, then keep reading. turns into a thicker gunk, making it hard for the shaft to turn. The Samsung evaporator freezer fan and motor is in the freezer compartment. As mentioned previously, the fan motor is one of the hardest working components in your air conditioner and wear and tear will eventually take its toll. If you’re not the most diligent person when it comes to HVAC maintenance, then the best way to ensure regular maintenance is to sign up for a maintenance plan with your HVAC company. Start by locating the direction of your ceiling joists (Photo 1). the lubricant has turned to gunk. A slow-turning fan will generate weak airflow. If none of these are the problem, the technician will check the condition of the electrical wiring and the windings to see if it is open or has a short. Once the fan motor breaks down, the AC will stop blowing cold air and that’s something you don’t want on a hot summer’s day. Look for any signs of string or plastic caught in the blades. Here’s what you need to know about an AC fan motor, what signs to look out for that indicate a faulty motor, and how to avoid it from going bad sooner than it should. turned out much easier than I expected. Definitely working. I then proceeded to test the rest of the component (controller and tiller). These videos are intended as entertainment only. If you’re like most homeowners, you probably don’t understand the inner workings of your air conditioner. The first step is to check the circuit breaker. A flywheel is a rubber disc that attaches the ceiling fan motor’s shaft to the blades. The rubber helps minimize vibration in the blades, but over time the material can crack and break. Most bath fans are mounted to a ceiling joist with the duct running parallel to the joist. But by far the easiest to fix, and the most common failure mode is when ), as well as a white wire, a black wire, and two brown wires. This easy maintenance task helps prolong the lifespan of the fan motor and can prevent more serious AC problems. The technician will do a resistance check by measuring the ohms. Step 3 Apply a light nondetergent household oil that is SAE20. That’s your cue to turn the system off and call the pros to repair the AC fan motor. This inactivity can lead to a build-up of dirt or rust that makes it difficult for the fan blades to start rotating again when you switch on the AC at the start of summer. front and back aluminium casting in place), but first I figured I'd try There are many ways these fans can fail, but if it hums when turned on, Three more screws to remove on the front to expose the motor. It’s the part of the unit that pumps air through the system. If you hear a buzzing sound, it’s another sign that the motor is reaching the end of its life. We’re going to discuss an important part of your AC unit — the fan motor. Add no more than 1 to 2 drops at each oil port. “Don't hesitate...just callthem! a few years, it's more likely to be seized than not. mode for fans like this. Turn the AC off and call an HVAC technician. some very thin lubricant from the WD40 loosens it, allowing it to turn. Loosening We were using this oscillating fan a few times a week. It plays a vital role in starting up your AC. Turn off the power to the fan at the main breaker panel. Our trained technicians will have your AC up and running again in no time. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. Wait 10 minutes. edit of the video I shot about it anyway. If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. Testing with the fan blade. Web Design and Internet Marketing by RYNO Strategic Solutions, Web Design and Internet Marketing by RYNO Strategic Solutions. While inspecting the fan, first check the bearings. If your AC has stopped blowing air, has weak airflow, or you hear unusual noises, do a quick inspection of the fan motor. The technician may try to manually kickstart it. Relays are what open and close the electrical circuit in an air conditioner. It spun. Being without air conditioning during summer is never pleasant. 15: Bad or jammed internal TEFC electric motor cooling fan : TEFC electric motors use a totally-enclosed fan for cooling. Following the great advice on this forum, I checked the blower motor resistor and plug, and replaced as advised. which is to say, it needs to be turned clockwise to remove it. If your AC offers different fan settings, check if it is set at low speed. That’s why when the capacitor stops working, so too does the air conditioner. Another cause of failure for fan motors is that the run capacitor deteriorates, Using the wrong type can clog up the bearings and ruin the fan, oftentimes requiring a full replacement. Most of them are caused by the over-heating of motor. John Heisz, having seen my video on fixing a fan, decided to fix his box fan. Are the fan blades turning? In some cases, this is caused by a malfunctioning thermostat. If the AC is still switched on, the electricity that runs through the capacitor can result in a serious electric shock, injury, or even death. If your air conditioner needs repairs and you live in Downtown Las Vegas or any of the surrounding areas including Henderson, Paradise, and North Las Vegas, call The Cooling Company at (702) 790-8277. If you’re working with the wires, do a resistance check between the white wire and each of the colored wires. even hum, it's the motor's thermal fuse, switch, or power cord. Ceiling fan lights are an attractive way to lower your cooling bill. The … blade, I loosen the nut on the fan. ... My fan fell from the shelf and not the fan blades are broken. However, the proc… Thx to this. Grasp the blades firmly and lift slowly to remove them. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. I want to hit the button to turn it on, but when I press it the device still wont turn on. Dirt can creep into the holes of the motor, causing more friction for the inner workings which stresses the motor and causes overheating. Behind the blade is another plastic nut which holds the back of the parts of the lubricating oil evaporate, and the rest oxidizes a bit and Electric motors should be installed very carefully and should be looked after at regular intervals. When your air conditioner suddenly breaks down, it’s difficult to know where to start in identifying the problem. 1. Any electrical-related faults should only be addressed by a professional. That’ll tell you where … Without that boost of power, the fan motor is unable to start. Lift off the top half of the motor housing and turn it over so the inside is facing you, then place it … When the AC runs without the fan circulating air, it can eventually lead to the evaporator coils freezing over. What happens is that over time, and with a bit of heat, the thinner It ran a bit If the resistance is zero, it means there’s a short. If you don’t hear anything, put your ear up to the middle of the case behind the blades. the bearings are seized. In fact, if the fan has not been used for After removing the front of the cage around the fan The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. Reinstall the center cap and the front piece of the fan cage before putting the fan … For fans like this, if they don't hum or get warm, the failure tends to be the switch, the power cord, or a blown thermal fuse in the motor. This can be dangerous and is a job best left to a trained HVAC technician or electrician. As a result, electric power to the fan motor doesn’t stop and the fan continues to run. Then locate the damper (you may have to remove the fan motor and blade from the housing). If quicker than this, it's time to unplug it, take it apart down to the motor 's rotor, and clean the shaft and oil the bearings. The freezer fan is responsible for supplying air over the evaporator coils while the compressor is running.. To inspect the evaporator fan and motor, unplug your refrigerator and remove the evaporator fan cover to check with a meter if needed. If the motor hums but doesn't run, and if it's hard to turn, its because the bearings are seized. Evaporator fan motors draw very little current and have a long life-cycle, but they can burn themselves out if their fan blade becomes jammed and unable to rotate. be the switch, the power cord, or a blown thermal fuse in the motor. If switching on the AC frequently causes the circuit breaker to trip, it’s likely due to a short in the windings. I know now about the parts of the motor fan. If the fan works, turn it off and unplug it. During winter your AC lies dormant. blade is typically a counter clockwise (or left hand thread) nut, The plastic nut holding the fan If the motor hums but doesn't run, and if it's hard to turn, its because In most cases, the ideal temperature is around 150 degrees Fahrenheit. Listen for a humming sound that tells you the AC compressor is functioning. A clogged air filter reduces airflow. The back of the plastic housing has a screw in the middle. Then unplug the fan and remove the motor plate (Photo 2). Verify that the wire's length is free from visible cuts and extreme pinches, such as stuck under a table leg. In both cases, the motor will need replacing. The overheating kills the thermal fuse in the motor winding bundle, resulting in another dead fan. If the bearings are jammed have acquired sludge on them, then fan make get stuck and not spin at efficiently. All you care about is that it continues to produce that refreshing cold air you rely on to keep your Las Vegas home cool. The motor is located in the condenser unit. If you’ve tried both of these steps but your fan still won’t work, try … When the fan runs intermittently, it could be one of two problems. This will in return will put more stress on the motor, which could also lead to the motor being burned out. Regular dusting in and around the motor hole can prevent this. One common reason an AC fan motor burns out is due to dirt building up around the fan motor. Most of these fans are operated with pull switches to adjust the speed and light settings. The bearing make it possible for the fan to spin. This repair The start capacitor is a cylindrical component that supplies the electric charge that starts the condenser fan motor. Relays are what open and close the electrical circuit in an air conditioner. For fans like this, if they don't hum or get warm, the failure tends to A trained technician can quickly spot certain problems on a visual inspection of the condenser unit. Capacitor problems should only be attended to by an HVAC technician or electrician. If the thermostat isn’t the issue, the most likely problem is a stuck relay switch. If you find something wrapped around the fan blades, remove it, then turn the power on to the freezer again. Power Button is Difficult to Press. However, you can prevent it from burning out sooner than intended with regular HVAC maintenance. which causes them to spin slowly, or that the thermal fuse fails, which turned Next, look through the vents at the top of the unit to see the fan. You won't regret it.”, © 2020 Copyright The Cooling Company. If you are near the condenser unit and it feels hotter than usual, it indicates that the fan motor may be overheating. The fan motor is a fairly uncomplicated yet vital part of an air conditioner. If you don’t see anything stuck in the condensing unit and the fan blades are turning freely and smoothly, then the likely cause is the fan motor. out to be the cause for the fan below. I gave up on that fan, but did a quick My mother's fan is stuck up and i know the motor is still ok because when i push the button switch the shafting is only vibrating so i cleaned it just what did you do. Adding Just a quick video on fan repairs, the fan blades move freely but the motor is not functioning. When the AC goes on the blink, a tripped circuit breaker isn’t the first thing that comes to mind for most people, yet it is a surprisingly common reason for an AC not starting. What is the purpose of the foam pad? Without that circulation of air, your AC won’t cool your home. Never attempt to work on a fan motor when you suspect an electrical issue. Equally frustrating is a fan that is working but the blades are rotating very slowly. When a relay becomes stuck, the circuit remains closed. Here are five signs that tell you that you’re dealing with a failing AC fan motor. A rattling noise can also be caused by loose or unbalanced fan blades striking the side of the fan housing unit. Check for Power to Your Outlet. 2005 T'Blazer, 6 cylinder, manual A/C controls. Same problem - seized bearings, fixed with a bit of oil. Without a functioning blower motor, your AC is rendered useless. You’ll either suffer no air or weak airflow. this removes the housing around the motor. If the fan blades move a little or it starts to turn, the motor is probably still good. Because the fan motor is one of the hardest working parts on an air conditioner, it is subjected to a lot of wear and tear that can lead to frequent repairs or replacement. Just want to ask. If the fan stops turning but the motor continues to hum, you probably have a damaged or broken flywheel. If your fan blades still do not work then the internal bearing has worn out and you need to replace the fan. The fan blades are behind metal guard on the back of the motor. If there is an infinite reading, it means there’s an open winding. Condenser fan motors all have a temperature stipulated by the AC manufacturer at which it can operate safely and problem-free. permanent lubrication. Most of the electric motor failures occur at the start up. The fan itself should be securely fastened to the shaft, should not wobble nor be bent or damaged, and the cooling air inlet openings should not be clogged. The fan should take 10 seconds to wind down to a stop if it is a 15-inch fan. Lubricate a Box Fan Motor Step 1 Remove the front grill of the fan. The opposite problem can also occur, i.e. This repair was much easier than anticipated. It’s the part of the unit that pumps air through the system. Alternatively, a loose wire or connection or a short in the motor windings could be the culprit. Replacing an HVAC motor is a job that can be done quickly once the problem is identified. out one of these fans.