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