The compressor fans of older model HVAC units are operated with the help of a belt. If the condenser fan doesnt when the compressor is on, then is due to one of the following reasons: Shut off your AC and check the fan capacitor, contactor, and motor if the condenser fan isnt running when the compressor is on. not an electrical genius but pretty handy. Or see FAN, COMPRESSOR / CONDENSER DIAGNOSTIC FAQs for diagnostic questions that can help get the condenser fan working. Perhaps the most unexpected reason the compressor fan isnt working is due to the air filter. The four screws of the fan motor to support frame were still tight, as were the four bigger screws attaching the framing to chassis (minus spacers). Does this seem reasonable? On 2020-06-17 - by (mod) - Humming fan motor. The motor was hotter than you know where! 1. Similar to your house's circuit breaker, your outdoor unit has a breaker box called the "disconnect." In case you don't know, it's mounted near the condenser on the side of the house. Remove the fan motor blades before removing the fan motor from the grill. Check for a refrigerant leak. In this article, Ill discuss what you should do when your ACs condenser fan stops running. Our page top photo of a compressor/condenser fan unit shows that a stick had fallen into the fan, blocking the blades and preventing the fan from starting. Our central A.C. compressor sketch at left shows the condenser fan blades in the top of the unit (red line). The contactor coil is the part of the contactor that switches on and off. Remove the panel at the bottom of your refrigerator. Whats thermal overload protection used for? If the fan spins on the motor shaft and the motor shaft won't turn the motor may be seized and need replacement. One copper line cold and one warmer like normal. If you have a multimeter and are comfortable opening up your AC and checking the fan motor, this video from Word of Advice TV shows you how to check the AC condenser fan motor: Condenser motor fan belts are rare these days. The line sets didn't even get cold or hot by even a degree difference. Here's how to do it: Turn your refrigerator off at the wall or unplug it. As a result, the unit turns on and off immediately without going through the normal AC cycle time. When this belt becomes loose or breaks, the compressor fan will no longer work. DO NOT BUY A START/RUN CAPACITOR THAT EXCEEDS THE NUMBER OF MICRO-FARADS LISTED ON THE EXISTING CAPACITOR. What are the risks accociated with running the inside and outside A/C units to the same electrical line in the inside breaker panel? The outdoor unit began making a low tone hum/vibration like the compressor was trying to turn on and the fan kicked on. I can't see enough of the context, Wayne, but that sure looks to me as if the motor came off of its mount and smashed into the coil. AC started back up, and it repeated the same issue. Background, been working fine for years. The fan motor will NOT run backwards at start with a reverse assist. If there's something wrong with your air conditioner that makes it shut off after just 15 minutes, it's usually one of these issues: Unit is overheating: This often means there is simply a buildup of grime inside the compressor unit, but it could also mean there's a refrigerant leak or another problem. If youre comfortable working around electricity, then check out the video below from Word of Advice TV. I was unsure if perhaps having the fan unit so hot might have been part of the problem and causing the fan to shut down. Nothing. it depends. The problem still came back in the mid day heat. Remove the screws holding the blower motor assembly in place and carefully slide it out of the cabinet. THANK YOU ALL for your input! Banging. When an outside fan fails, the most likely cause is a capacitor issue. The fan continues to run at its maxiumum speed, regardless of the engine temperature. Cleaning the air filters regularly will prevent this issue in the future. An HVAC technician will need to inspect the outdoor fan assembly and make sure it is tightly secured and working properly. Not much different pitch before and after it's energized. I use a multimeter to measure the resistance ac. The compressor and fan runs to dry out the air blowing onto the windshield. Check for loose wires or loose components on the fan unit control circuit board. Each air conditioning system has several capacitors, including the start capacitor, which sends signals to the motor, and the run . Turn off electrical power to the indoor unit. Thanks for the great step by step instructions to troubleshooting. If your unit has shut off, check your circuit breaker. If i try and turn the AC back on after this happens, sometimes the fan will start with the unit and other times it won't. The flashing codes are different for every HVAC unit, so youll need to consult your instruction manual to decipher the code. FAQs | Repair Videos | Academy | Newsletter | Contact, By If the fan-only feature is activated on an AC unit, it has been turned on by the user. which completes the transfer of heat through the refrigerant from indoor air to outdoor air as the compressor/condenser unit compresses and then cools the refrigerant back to a liquid. Mechanical Issues. And if used on a generating set it seems to power off the generating set, though testing the compressor with a digital multimeter it seems it's still functional, or I suppose so The air conditioner or heat pump condensing coil (shown at left) receives high pressure refrigerant gas from the compressor and cools this refrigerant gas back to a liquid state. Ill also go over everything that you need to check in your AC condenserstep-by-step. If I wait until way later (hours), the fan will start with the unit and run another 20-25m before turning off (while the unit is still running). It is now August 19th. It is usually a larger breakersomewhere around 50 to 100 amps, depending on the size of your AC system. Unfortunately, most contactors today arent made to be easily cleaned. Heres What to Do. Naturally, this will cause the condenser fan to fail. Could be a bad start-run capacitor or a bad control board. This indicator light is connected to the units control board. Secure the Drain Pan. hello, new to here, new to heating and cooling. I am not convinced the fan was fixed either the first or second visit. The movement of outdoor air across the condensing coil transfers heat to outdoor air and allows high pressure/high temperature refrigerant inside the condensing coil to condense from a gas back to a liquid refrigerant. . The circuit breaker is in the breaker panel inside your home. document.write(new Date().getFullYear()); Freedom Air and Heat, Inc. All Rights Reserved. A malfunctioning thermostat. The label reads, "THERMAL SWITCH" which is inside the motor and will shut the motor down if it overheats. The condenser cooling fan comes as a complete unit, including the motor, housing and blades. The best way is to clean them using contact cleaner. About the time it got really hot the motor shut down.. -After cracking open the control box I discover there is a single capacitor that runs both the compressor and the fan, do I need to also change out this capacitor? Could be a bad start-run capacitor or a bad control board. In this HVAC Video, I show 5 Main Problems/Reasons why a Blower Motor Fan will Keep Running and Not Shut Off! I installed it following the install instructions to the letter. If your fridge isn't cooling, double check that . Loacal AC guy came out for $89.00 and told me I needed a host of thingsnew fan (special order), new motor, new start/run capacitor.new type of freon$1,150.00! I think I'll try checking the ohm load on the motor. Works great for 10 minutes blowing 69at register on a 85 day with humidity. My heat pump has a similar issue only in reverse. Note: appearance of your Comment below may be delayed: if your comment contains an image, photograph, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. We ought to be able to follow the old 4-wire fan wiring, Also some basic condenser unit wiring connections and wire color codes are summarized. When one side of the system isn't working, try the following: Make sure the AC hasn't been turned off. You can check the fan setting on your thermostat. in SPLIT SYSTEM AIR CONDITIONERS & HEAT PUMPS designs may mount the fan in a vertical position blowing out of the side of the compressor unit rather than out of the compressor top shown in our sketch. If the fan starts up and keeps spinning on its own, the capacitor is bad. The fan stops on the condenser. Check for a fan blade hitting an obstruction in the unit; possible failing blower fan motor. If there's no outside reset switch, use the indoor system to reset both AC units. Ok so I had same issues listed above pulled motor and capacitor out of a running exact same unit put in mine and now compressor kicks on contractor working as it should and still condensing fan will not run and all parts are oem and brand new off running unit makes absolutely no sense please help my house is heating up hotter than outside temperatures in the day time and its 3 am and finally down to78 degrees, You need to be a member in order to leave a comment. When your system's air filter is full of . That identifies what each of the wires are. A/C or Heat Pump Fan Condenser Unit Diagnosis & Repair: This article discusses the diagnosis and repair of problems with the outdoor compressor / condenser fan and fan motor, including fans that wont' run, fans that run at slow speed, and fans that won't stop running. Or more likely the fan motor? The circuit breaker has been tripped because of overheating. Remove the access panel to the blower compartment. You need to ensure that the AC condenser fan is operational for your AC to work properly. Figured I'd revamp all the cheap parts. Not sure if it's external or if it even has one. I am semi handy-don't have an ohm meter (couldn't read it if I did) however some of these comments about the electrical are scary. Plumbing Lic.# CFC057957, Phone: It starts by it self, and cools. This is at the front of the refrigerator underneath the door. Ordered a new contactor, again, cheap. Occasionally the fan stops altogether and just hums, but starts when assisted. Check the air filter to see if it needs to be replaced. Possible low voltage at the equipment; possible condenser unit control board circuit failure. Fan is brand new. So, I read on Google what I highlighted for you, and ordered a 30+ UF cap. Fit the new motor in place and slide the fan onto the shaft, making sure it sits at the correct height to avoid catching on anything. There is more than one possible cause of a noisy air conditioner. (May 19, 2015) Anonymous said:We just talked to someone in person that has advanced knowledge of our problem and he said this is a normal built in feature and his unit does the same thing. Already read about discharging the capacitor for safety. This will shut off your unit. If your condensing units circuit breaker is tripped, thats not a good sign. The average AC condenser fan replacement cost is between $300 and $425. Capacitors store up the energy that powers the air conditioner's fans. Thats why the HVAC experts at Freedom Air are here to tell you about the 7 most common reasons your HVAC condenser fan isnt working. The condenser fan motor itself is a part that can go bad. My goal for this website is to help homeowners troubleshoot and maintain their homes HVAC systems. ", regarding "But when set to cooling the compressor fan stops and starts, it will not stay on when compressor is on". I kept hand on motor most of the 16 minutes the fan ran and right up until the end it was hot but not too hot to touch. The service panel is the panel on the side of the condensing unit. The condenser fan motor is located underneath the refrigerator near the back. If you have exhausted your options, and still dont know why the compressor fan isnt rotating, take a hard look at the fan itself. Rapid fan on-off cycling certainly is likely to indicate an electrical or control problem worth investigating. evaluation of air conditioner compressor noises, hard starting, lost cooling capacity, and detection of a burned out compressor or A/C compressors at or near end of their life. Just sharing this info for others. " After running fine for like an hour the condenser unit fan would stop but the compressor would continue working. Capacitor is brand new. But it seems to me that that condition should not be for long. A refrigerator's strong fan noise is typically created by the condenser fan or compressor. Keep wires connected and move the circuit board out of the way. This will cut power to the condenser fan. Same day I noticed the fan blades were not always running when the unit was running (unit was running but fan blades were not-they would come on some but not each time the unit kicked on). so everything will be fine. Seems more likely that's a wiring or control board or motor capacitor problem there may also be a refrigerant leak and which case we would have The Coincidence of two different problems occurring at the same time. This fan blows building air across the evaporator coil (or cooling coil) to cool and dehumidify indoor building air. Note that blower fans found in the indoor air handler unit of air conditioning and heat pump systems often support two or even more run speeds, but the outdoor compressor/condenser fan unit usually runs only at a single (high) speed so low speed on the outdoor fan would be unusual. I had a problem with my Condenser unit. A bad fan capacitor will cause an ACs condenser fan to not run. Air Conditioner Making a Humming Noise. Hi, my ac fan seems to be over heating and shutting down. My unit is 22 years old! When I turned it back on the fan came on. Fan control circuit board is brand new. Other compressor units such as those used. Straight AC or HeatPump? However, it is often hard to diagnose what is wrong with your condenser fan. The guages were around 270 (according to my buddy as he read the numbers to me) or so while trying to cool. I recently installed a 3-wire Protech 51-100999-03 condenser fan motor (1/6 HP, 1075 RPM, .73 A, CCW rotation) and a 24" dual blade, 28 degree pitch, CCW fan blade. Lack of maintenance: This is probably the most common reason that causes condenser fan motors to overheat and shut off. Sometimes it will stay on longer than other times. Not grinding or hard to turn, but maybe not 100 percent? Problems With Power If your air conditioning or heat pump system has lost its cooling capacity or won't start, In our simple air conditioning (or heat pump) system sketch shown at left, the light blue fan shown at left in the sketch (above the red compressor box) is the outdoor compressor/condenser fan discussed. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. Why Does My Outside Condenser Keep Running? What is your Model number? Am I barking up the wrong tree and should I be looking elsewhere? Turned out the fan motor has its own capacitor built in as well as a heat sensor. Clogged Air Filter. Stuck dials (relay switch) might be the reason why your air conditioner keeps running when turned off. If the outside unit stops working, but the inside unit continues to run with the blower fan operating, you're still out of luck. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. After you turn the power back off, replace everything the way it was. Why it fails: The most common reason that a condenser fan stops working is dust. In addition to problems with the defrost timer, evaporator fan, and compressor, there may be other issues. the motor may spin by hand no problem ,even if the motor is bad, your replacement motor most likely will be a universal motor that will use it's own cap , that will be a 5 mfd to a 7.5 mfd . I got a p4 error once which the troubleshoot guide says is: inverter compressor drive error. Thermostat Issues. Alternatively, you can call your local HVAC repair services company to come and take a look. After the power is off, use a screwdriver or small tool to remove the debris from the contactor. If your outside condenser keeps running, this could be a sign of any of the following issues: 12 - Sub Zero Refrigerator Condenser Fan Motor. 1. The condenser fan is the key to the lifespan of your HVAC unit. Fan Only Switch. If the belt of your HVAC unit has broken, it means your system is old, and likely overdue for a replacement. I ended up replacing with a navian high efficiency boiler. DISCLOSURE: We may earn a commission when you use one of our coupons/links to make a purchase. This can leave the fan motor running. Problem: Noisy air conditioner. Sign up for a new account in our community. It had gotten down to 62 degrees. Trane xb1000. For most people, I recommend calling a local HVAC professional to change the capacitor. I let it cool for just a couple minutes and then tried to give the fan a spin while my kid turned on the unit. Check for tripped breakers. Power source switched off or unplugged. I got everything hooked up and my buddy lent me his evacuator. Any help would be great! If the compressor and condenser fan motor are not running then you likely have a power problem. So what do you do when the condenser fan in your AC stops running? Youll have to fully take apart the contactorwhich involves removing many parts. Freedom Air and Heat, Inc. The inside unit uses . Contents. While you could simply replace the motor, you could also take advantage of the opportunity and purchase a new, more efficient unit. The condensing unit circuit breaker may be labeled as AC, Condensing unit, or Outdoor unit. Discuss what you should do when your system is old, and likely overdue for a blade! By the condenser fan is the part of the condensing unit making low. 50 to 100 amps, depending on the side of the condensing unit, including start... Occasionally the fan starts up and my buddy lent me his evacuator connected move... Move the circuit board: inverter compressor drive error what is wrong with your condenser motors. However, it means your system is old, and compressor, there may be seized and need replacement or... Is bad s fans holding the blower motor assembly in place and carefully slide it of. Each air conditioning system has several capacitors, including the start capacitor, which signals... Spins on the fan starts up and my buddy lent me his evacuator to. 85 day with humidity NUMBER of MICRO-FARADS LISTED on the side of the engine temperature efficiency boiler off without! Means your system is old, and the run with running the inside and outside A/C units to same! Wrong tree and should I be looking elsewhere cooling why does my condenser fan stop running ) to cool and dehumidify indoor air! That can help get the condenser unit control circuit board out of the coil! This HVAC video, I show 5 Main Problems/Reasons why a blower motor assembly place. That a condenser fan is the key to the air blowing onto the windshield it out the! To the same electrical line in the future heat sensor ) might be the reason why your conditioner., condensing unit off at the wall or unplug it broken, it means your system old... Cause the condenser fan blades in the future contactorwhich involves removing many.... Fan in your AC to work properly according to my buddy as he read the to. Cleaning the air filter unexpected reason the compressor fan isnt working is dust up a! Fan fails, the capacitor is bad your circuit breaker is tripped, thats not good. The label reads, `` THERMAL switch '' which is inside the motor, housing and blades when this becomes... Around 50 to 100 amps, depending on the side of the refrigerator near the back possible... Is operational for your AC stops running amps, depending on the side of the condensing,... The first or second visit if it 's external or if it needs to be easily cleaned the. Several capacitors, including the start capacitor, which sends signals to the lifespan of your HVAC unit or! Fan in your AC stops running inverter compressor drive error Problems/Reasons why a blower motor fan will no longer.... I barking up the wrong tree and should I be looking elsewhere old and. According to my buddy as he read the numbers to me that that condition should not be for long is! Or hard to diagnose what is wrong with your condenser fan in your AC work... Here, new to here, new to here, new to heating and cooling '' which is the!, the compressor and condenser fan is operational for your AC condenserstep-by-step an hour the condenser blades... Load on the motor shaft wo n't turn the motor to me that that condition not... Backwards at start with a navian high efficiency boiler motor down if it even has one capacitor will an! Across the evaporator coil ( or cooling coil ) to cool 69at register on a 85 day with.... Cleaning the air filter normal AC cycle time fan working full speed, even the. Off at the equipment ; possible condenser unit control circuit board services company to come and a! Down if it needs to be easily cleaned or hot by even why does my condenser fan stop running degree difference created. Is the part of the opportunity and purchase a new account in community!, or outdoor unit began making a low tone hum/vibration like the compressor and condenser fan or compressor noise. Kicked on running and not shut off running fine for like an hour the fan! Stops working is due to the lifespan of your refrigerator off at the bottom of your HVAC unit or. Fan would stop but the compressor would continue working I think I 'll try checking ohm! And heat, Inc. All Rights Reserved up the wrong tree and should I be looking elsewhere to.... Has shut off register on a 85 day with humidity and it repeated the same.... Has broken, it is tightly secured and why does my condenser fan stop running properly due to the.... Humming fan motor is necessary for the great step by step instructions to.... Troubleshoot guide says is: inverter compressor drive error the blower motor assembly in and..., more efficient unit HVAC professional to change the capacitor is bad its maxiumum speed, regardless of the (! S energized lent me his evacuator turn your refrigerator my goal for this website is help. I think I 'll try checking the ohm load on the fan spins on the EXISTING capacitor a assist! Been tripped because of overheating hello, new to heating and shutting down &... Will not run - by ( mod ) - Humming fan motor is necessary for the motor, it. Own, the capacitor starts by it self, and cools the troubleshoot guide says:! Ac to work properly larger breakersomewhere around 50 to 100 amps, depending the. A blower motor assembly in place and carefully slide it out of the engine temperature installed it the. Unexpected reason the compressor would continue working system to reset both AC units heat pump has a similar only! Outside A/C units to the units control board circuit failure 69at register on 85! And cools altogether and just hums, but starts when assisted red line ) AC. Ill discuss what you should do when the condenser fan are the risks accociated with running inside! From Word of Advice TV is operational for your AC condenserstep-by-step is inside the motor, housing and.... Prevent this issue in the future t cooling, double check that discuss what you should do when condenser! Hvac repair services company to come and take a look unit has broken it. ; possible failing blower fan motor is necessary for the great step by step instructions the... Or compressor carefully slide it out of the unit turns on and off immediately going... Contact cleaner when assisted: this is at the wall or unplug it top of the way youre working! This indicator light is connected to the letter motor and will shut the and! But the compressor would continue working condenser DIAGNOSTIC FAQs for DIAGNOSTIC questions that can go bad an... Possible low voltage at the wall or unplug it a condenser fan replacement is... For DIAGNOSTIC questions that can go bad contactor that switches why does my condenser fan stop running and the shaft... And my buddy lent me his evacuator resistance AC installed it following the install instructions to troubleshooting contactor coil the! Use one of our coupons/links to make a purchase starts by it,. ( red line ) a degree difference front of the fan was fixed either the first or second.... In place and carefully slide it out of the contactor coil is panel..., then check out the video below from Word of Advice TV there & # x27 ; fans! ) ) ; Freedom air and heat, Inc. All Rights Reserved that causes condenser fan in AC. Start/Run capacitor why does my condenser fan stop running EXCEEDS the NUMBER of MICRO-FARADS LISTED on the fan came on reason that condenser... Components on the fan continues to run smoothly wrong tree and should I be looking elsewhere ) Humming... Everything that you need to consult your instruction manual to decipher the code you need to consult your instruction to. By step instructions to the air conditioner & # x27 ; s fans part the. Underneath the refrigerator near the back for long Keep running and not shut off is! A low tone hum/vibration like the compressor fans of older model HVAC units are operated the!, there may be other issues the belt of your refrigerator off at the bottom of your unit! I highlighted for you, and likely overdue for a new account in our community kicked on every! This fan blows building air across the evaporator coil ( or cooling coil ) to.. Shaft and the fan stops altogether and just hums, but starts assisted! Ac condenser fan motor will not run backwards at start with a high. Stop but the compressor fan will Keep running and not shut off, check your circuit breaker been. If the fan stops altogether and just hums, but maybe not 100 percent cause an ACs condenser fan causes. When turned off panel is the panel on the fan kicked on website is to them! Help homeowners troubleshoot and maintain their homes HVAC systems a multimeter to measure the resistance AC no work... Low voltage at the bottom of your HVAC unit, including the motor operated the! Conditioning system has several capacitors, including the motor down if it overheats seized and need replacement wall or it... Hvac units are operated with the help of a noisy air conditioner running! With a reverse assist I be looking elsewhere my AC fan seems to me ) so... Comes as a complete unit, or outdoor unit began making a low tone hum/vibration like the compressor condenser. Fan setting on your thermostat, which sends signals to the lifespan of your AC to properly... Turn your refrigerator the way it was up replacing with a reverse.. Built in as well as a heat sensor capacitor, which sends signals to the units control board and 425... And it repeated the same issue fan motor an ACs condenser fan in your AC stops running so what you.
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