Fan belts are components that wear down over time. Background, been working fine for years. Check that power is on to the outdoor unit and that the indoor thermostat is calling for cooling and set to cooling mode. My AC unit is 18 years old, and I was afraid it was hopeless, but I decided to run through your checklist, and I was able to get it cleaned up and running again. A stuck contactor could be the reason why you outside ac fan won't turn off. Cleaning the air filters regularly will prevent this issue in the future. There are also fuses in the disconnect box near the condenser whether it is a heat pump or an air conditioner. On our outdoor heat pump unit, when set to heating compressor and compressor fans works PERFECT! Move the refrigerator away from the wall and unscrew the panel at the bottom back. Bob,Thank you for the helpful diagnostic question about your Pioneer brand Mini Split AC unit. Check to see if the fan starts spinning. When I turned it back on the fan came on. The new 3 wire fan doesn't have this wire. 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. it depends. My goal for this website is to help homeowners troubleshoot and maintain their homes HVAC systems. Fan motor free spinning but shuts down about 200. One of the first symptoms commonly associated with a bad or failing cooling fan relay is an engine that runs hot or overheats. THANK YOU ALL for your input! This will cut power to the condenser fan. See CONTROL CIRCUIT BOARD, A/C for details. The fan does not stay off for a "long" time. All of the above-listed air conditioner or heat pump components are discussed in detail throughout this website using the links at the left of these pages. three post C, F and HERM. Turn off power, visually inspect fan and fan blades: are blades cut, bent, or damaged? The problem came back. Hi, my name is Trey Lewis and Im the founder and chief editor at HVAC Training Shop. Not grinding or hard to turn, but maybe not 100 percent? DeniseThere is probably something here that we don't understand. Here's why: Your standard split A/C unit has 2 parts: the outside unit and the inside unit. Within this unit, a fan blows cool air over the condenser to keep it cool. The condenser fan is visible inside of the outdoor compressor/condenser unit such as the unit shown in our sketch at left, an in our other photos on this page. Check for tripped breakers. I was expecting it to not turn as freely -Motor is definitely hot when motor shuts down. Why Does My Outside Condenser Keep Running? As the fan keeps spinning, dust and maybe even small debris will build up around the fan. It is usually near the area where the power connects to the condensing unit. Anything else make it shut down like that? Also, the motor I have doesn't have a thermal overload switch on it's exterior. Here Are the Top Causes, Heat Pump Pros and Cons What You Need to Know, Thermostat Not Turning On AC? Is there fluid leaking out of the capacitor? replace with OEM motor if you can afford it and can still get it . Then, later look at what can prevent your ac compressor from running when your outdoor fan is running without problems. The fan with a little help it gets going, then then craps out after about 10 minutes. Condenser fan motor runs backwards. I then went online and bought a new fan for $22.00 and installed it. Is this more likely the fan bearings? Especially in the summer, parts of your air conditioner can overheat and trip your circuit breaker. FAQ 1. Make sure the freezer door seals shut. This will help reduce the load on the refrigerator's compressor, which can cause buzzing. Giving them a good clean should solve the problem. After you turn the power back off, replace everything the way it was. Fan is brand new. I notice the red on the unit is coming off of a small circuit board that says low. It may be the AC condensers compressor or fan. On 2020-06-17 - by (mod) - Humming fan motor. The problem came back. If your air handlers indicator light is flashing in some sort of pattern, then its telling you that something is not working correctly. If your unit has shut off, check your circuit breaker. If you have an ac compressor that is not working but your air handler fan is running properly, look out for the following things: 1. See COMPRESSOR / CONDENSER INSPECTION CHECKLIST for a simple checklist for the outdoor compressor/condenser unit. If the fan starts up and keeps spinning on its own, the capacitor is bad. You should be able to use a single switched or double pole switched contactor. Unbolt the old motor and fan from the top grill and keep the nuts, bolts, and any screws safe. ugh, I mean I did those 2 tasks separately hehe. Dodge Master. Test the windings of the motor of the evaporator fan with a multimeter. thank you, My AC suddenly started having the same issues mentioned in this thread. FAN, COMPRESSOR / CONDENSER UNIT at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. 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. Please advice on what to do, thank you. This Q&A were posted originally at FAN, COMPRESSOR / CONDENSER DIAGNOSTIC FAQs. Capacitors can hold lethal amounts of charge, so they need to be handled properly when swapped out. Unscrew and lift off the top panel. Thats why its important to check your fans incoming power, capacitor, and contactor first. 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. Got up this morning and it was off, but the unit was still running. So I'm unclear why you had to charge your unit, though perhaps you followed what I'll describe below as a vacuum then charge procedure.IF the refrigerant charge were lost, the service tech would have pulled a vacuum on the system for 24 hours or longer, then put in the measured charge of refrigerant of the proper type, and would have confirmed proper operation, perhaps measuring temperatures in the refrigerant lines and in the air in and out of the condenser unit or the indoor cooling unit.Below is an example - for other readers, of a Pioneer mini-split AC system.If you don't have all of the manuals for your system you can download them from Pioneer or directly here at InspectApedia.com atPIONEER MINI SPLIT SERIES INSTALLATION MANUAL [PDF]PIONEER MINI SPLIT SERIES SERVICE & REPAIR MANUAL [PDF]PIONEER MINI SPLIT SERIES USERS MANUAL [PDF]I'd contact Pioneer directly at their tech support department to ask for further help with that P4 error.Contact Pioneer at(800) 919-0150https://www.pioneerminisplit.com/. This keeps them both running together. See if you can find the wiring diagram for your condenser unit - often on a sticker in the unit, or always in the IO manual for the unit. Tech comes back out same day and tells me I have a evaporator coil leak and I need to replace the evaporator coil. Sketch from Carson Dunlop Associates (found at page bottom, Click to Show or Hide). The coil was not penetrated & maintains pressure. I had a problem with my Condenser unit. Tech came out and replaced the fan motor. Contactors are a relatively inexpensive item to replace, and youll have more peace of mind with a brand new contactor installed. Clean the dirty condenser coils. The capacitor stores energy that is used to power your air conditioners fans. Condenser fan motor has a loss of lubricant, Off-balance/improper rotation of fan or incorrect fan blade, Presence of moisture, dirt or debris in fan motor. Still same issue. If the refrigerator runs constantly there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. Make sure the door seals are properly sealed and tight. Turn the power back on and make sure everything works. Simply put, the dials usually meet to complete the circuit and turn on the compressor if the room temperatures are high. Naturally, this will cause the condenser fan to fail. I had a similar problem, fan ran for either 15 seconds, 2 hrs or a day or so but each time it would seem to die but yet the fan looked like it was very controlled, not binding, no bad noises,really confusing. In addition, I installed a Protech 50 + 3 F dual run capacitor and a . Much like the contactor, HVAC motors get worn out over time and will stop working. Could there be any other reason the fan would just stop, or put another way, could a good motor overheat because of some other reason (I figure the fan is stopping because the motor is over-heating right?). If the compressor won't start and if the unit trips a breaker or blows a fuse as soon as it tries to turn on, the motor is burned out and shorted. I'm concerned that the leak in your wall could have shorted an electrical connection or electrical box device. I though at first that I just needed to replace the start assist capacitor, but now I am wondering if maybe the fan is crapping out. AFTER the motor craps out you have to wait a little while and you can get it to turn again (with assistance) to run properly for another 10 minutes. Then they replaced the fan motor. Faulty electrical signals. I ohmed the 3 motor windings and they add up correctly. Am I able to wire a 3 wire fan into a heating pump that had a 4 wire fan? When hot weather comes around, the last thing that you need is your AC equipment breaking down. The fan would run for a while then stop. I think I'll try checking the ohm load on the motor. InspectAPedia tolerates no conflicts of interest. AC started back up, and it repeated the same issue. 1. Buzzing may also indicate an electrical problem somewhere in your air conditioner. If your AC fails in hot summer, there is a good chance that its the capacitor.Before you call HVAC guy and spend lot of money, you can try it yourself a $15 . The fan motor is located behind the fan itself. 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. Thanks for the great step by step instructions to troubleshooting. Whether its changing an air filter, troubleshooting a blower motor, or just buying a new humidifier, I want to make sure that youre covered. Why it fails: The most common reason that a condenser fan stops working is dust. Step 4. A bad fan capacitor will cause an ACs condenser fan to not run. But when set to cooling the compressor fan stops and starts, it will not stay on when compressor is on. To check the power at your condensing unit, first, check your circuit breaker panel. AC ran fin all Summer of 2018. A condenser coil fan then blows that air over the condenser to push heat outside your home. Same. If you use a screwdriver to remove the paneling of the fan and then turn off the electricity to the fridge, you can use a multimeter to test the motors wiring for continuity. That also means its bad. So what do you do when the condenser fan in your AC stops running? Heres What to Do, AC Contactor Not Pulling In? And the AC compressor stops prematurely. Please bookmark this page to make it easy for you to check back for our response. So how do you fix dirty contacts? 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 you see a small red button on the side of your fan motor, thats the thermal overload reset switch. Remove the service panel on the condensing unit, The AC compressor is on but the fan isnt running, No Water Coming Out of Your AC Drain Pipe? The problem still came back in the mid day heat. Naturally, this will cause the condenser fan to fail. If something is blocking it from pulling in, then the contactor wont switch on. The contactor coil is the part of the contactor that switches on and off. I'm worried though about the others mentioning that even replacing the motor didn't fix this symptom. This blockage will strain your compressor fan. Could a bad capacitor be the culprit to explain the stopping during operation? The outside condenser of a central air conditioning unit can be very loud. Thats a surefire way of knowing that a capacitor is bad. -OK opened up and spun motor by hand with shaft and it actually spun freely (fan blade still on). Fan control circuit board is brand new. Titusville/Mims 321-264-7255 If the condenser coils are too dirty, the air conditioner's cooling power is limited so the system has to keep running in attempts to cool each room. The AC's capacitors are small, cylinder components that send energy signals to power the fan motor and the rest of the AC unit. If there's no outside reset switch, use the indoor system to reset both AC units. Broken Motor. If the fan contactor is broken, then the fan wont run. Crimped for better connection. Test and Replace the Fan Motor. Could be a bad start-run capacitor or a bad control board. Put the cage and panel back on the condenser and make sure everything is tight and back where it came from. Now being a thermal unit I figured that was definitely an over heat issue. I got a p4 error once which the troubleshoot guide says is: inverter compressor drive error. The unit cooled fine until late last week when we noticed it being extra warm but we have had a mild spring until the last couple of weeks. I installed that cap and the motor shut down in five minutes. If replacing the Motor, you should also replace the Capacitor, (at least the Capacitor section for the Fan). Faulty thermostat: The wiring may . Trane xb1000. Some units also have dual capacitors that power you air conditioner's fans, as well as your compressor. Check the freezer's compressor. 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. Only one image can be added per comment but you can post as many comments, and therefore images, as you like. If the fan spins on the motor shaft and the motor shaft won't turn the motor may be seized and need replacement. 5. Some units will automatically shut off when they sense the filter is blocked. In addition to problems with the defrost timer, evaporator fan, and compressor, there may be other issues. On occasion a "slow" outdoor fan may be due to a fan blade that is not secured to the fan motor shaft. The tech then recognized that the fan blades where on backwards (his fault). I then opened the service valve port to charge the line set with freon (whatever the new stuff is called). Any help would be great! 3. You'll know this is the problem if your inside fan runs and you hear the buzzing noise coming from the outside unit. Is the fan blade assembly secured to the fan motor shaft? 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. Each air conditioning system has several capacitors, including the start capacitor, which sends signals to the motor, and the run . Replaced capacitor because it was cheap and could get next day. Also see NOISES, COMPRESSOR CONDENSER where some noise problems include fan noises that may help diagnose a problem. 21,873 Answers. Stephen. The motor was hotter than you know where! Initial,simple diagnostic checks of the air conditioning compressor are also described. The dirty air filters prevent the air from getting through them, making the blower motor forcefully pull air into the unit. Vacuumed out the bottom of the unit with about ten years of crud in it since I had the thing apart. Or see FAN, COMPRESSOR / CONDENSER DIAGNOSTIC FAQs for diagnostic questions that can help get the condenser fan working. The condenser fan has not stopped. This fan blows building air across the evaporator coil (or cooling coil) to cool and dehumidify indoor building air. 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 condenser unit fanis a blower that moves outdoor air across the condensing coil found in the outdoor compressor/condenser unit. my heat pump fan out side is not working after a man put a water pump in the roof be for he came water run down the wall in side, On 2019-11-25 - by (mod) - Common causes of a fan motor intermittently cutting off, ChrisCommon causes of a fan motor intermittently cutting off include, - defective fan control relay or control board, - overloaded motor, including possibly low voltage supply that could affect even a new motor, - improper installation, binding motor or fan assembly (also overloading the motor)You might also find by searching this website our article on ELECTRIC MOTOR DIAGNOSIS. The dark blue fan shown at right in the sketch is the indoor air handler or blower compartment or cooling coil fan found inside the building. That could also mean that its bad. Additionally, the cooling from this AC unit is not very good even when the fan is running - there's only about a 9-10 degree difference between the intake and out vents. To clarify, the compressor and fan will run in defrost mode. Not enough space clearance. Typically, there's an on-off . If you see that the fan starts spinning, this means the problem is probably with the start capacitor. 1401 Clearlake Rd. Change the setting to "auto" to ensure it is only running when your air conditioning unit runs. A faulty cooling fan relay can also negatively affect air conditioning (A/C) performance.The reason being, on most vehicles, is that the cooling fan doubles as a condenser fan.When the A/C is turned on, the fan moves air across the A/C condenser, thereby removing heat from the refrigerant, which changes from a vapor to a liquid state as it gives off heat it . The fan should be disconnected and the three wires should be checked to ground. Fan is still intact. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. So how do you know if your condensing units fan capacitor is bad? A capacitor may be used to start the fan and keep it runningas in a start/run capacitor. Changed compressor starter capacitor but not the dual run capacitor. The most common cause of a contactor coil burning out is due to incorrect voltage. Read on to find the best solution based on the cause of the problem. If the belt of your HVAC unit has broken, it means your system is old, and likely overdue for a replacement. You may detect this by noticing that you can wobble the fan motor shaft (when power is OFF) or you may notice that you can pull the shaft in and out of the motor (loose end-play). No cooling, no heating. A blower fan may run for a brief while after the compressor motor has stopped but if the outdoor fan never stops check for a problem with the control board wiring or circuit. Took the temp at fan motor and it was over 200. The fan is still cutting off and not cutting back on. I've bought nothing but Amrad caps for 3 years now. 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. The flashing codes are different for every HVAC unit, so youll need to consult your instruction manual to decipher the code. A burnt-out motor is yet another reason a condenser fan would stop working. Anything else you can think of to ask about this situation? It could be due to one of the following issues: In any case, its better to get your local HVAC professional to take a look at your condensing unit if the fan motors thermal overload keeps tripping. The motor cost me $165.00 from Amazon, and the cap came from another supplier..so $180.00 is the cost which is still a far cry from "Fly By Night AC Company" that came out before. Rapid fan on-off cycling certainly is likely to indicate an electrical or control problem worth investigating. I ended up replacing with a navian high efficiency boiler. Power source switched off or unplugged. Examples of A/C or heat pump fan/condenser unit problems discussed here include Condenser fan won't start or won't run; condenser fan won't start, or condenser fan keeps stopping; A/C or heat pump condenser fan won't stop running - keeps going forever; Noisy buzzing or wobbling ticking compressor fan unit diagnosis/repair; Air conditioner condenser compressor fan diagnosis & repair prodedures - things to check. I've learned with all the chinese capacitor issues over the last few years that if the capacitor is weak the motor will run slow and run hot. First, make sure that the fan motor has cooled down to ambient temperature. I had a HVAC Repair company come out over 5 times trying to fix it. The noise can be reduced by removing any dust and debris that may have gathered between the fan blades. Ensure power to the unit is turned off. The green line marks a common location for the fan control circuitry, and the blue line marks the fan motor. That being said, its usually okay to reset the breaker and see if it trips again. Same or similar situation. 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. Contents. This is at the front of the refrigerator underneath the door. Remove the fan motor blades before removing the fan motor from the grill. Did find a lose red wire on the contactor. That means that you dont need to manually reset the thermal overload when it tripsit will reset automatically after it cools off. The heavy fan motor is mounted on the panel, so have a helper hold it while you install the blanket. The capacitator losing its charge. If the condenser fan in your unit gets faulty, it can result in a blown fuse as the system has to work harder to keep your space cool. ", regarding "But when set to cooling the compressor fan stops and starts, it will not stay on when compressor is on". Capacitor is brand new. My York YCJF42541S1A outside unit was running but the fan blades weren't so I turned off the unit to make sure I didn't make the repair worse. Did have a heavy storm. If the outside unit stops working, but the inside unit continues to run with the blower fan operating, you're still out of luck. Moral of the story: do it yourself and use the right capacitor. If it is an air conditioner check for an air conditioner breaker trip. If the compressor/condenser unit is wired with 240V (or "220 volts") as most are, an overcurrent at compressor start-up may be tripping just one leg of a two-pole breaker or one of a pair of fuses, leaving the other circuit "live". Why does a condenser motor fan break? I recommend just replacing the entire contactor if its contacts are dirty and worn down. You may need a new fan assembly or a few bolts tightened. Remove the top of the unit with the fan, disconnect it, and lift it clear. Dirty condenser coils. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. If you go With OEM parts and it is plug and play (no change from what is there as far as hook up) , you could change the CAP and Motor just being mechanically handy and make sure the wires go back in the same place(just make sure to pull the disconnect before working on it). If the fan itself is balanced and undamaged and secured to the shaft and the fan motor buzzes or hums the motor may be damaged, overheated, have an internal bearing failure, or the motor may be hard starting. (May 30, 2020) Jeff said:I have a heat pump unit where the condenser fan motor has burned up. Replace a faulty evaporator fan motor. My unit is 22 years old! The fan continues to run at its maxiumum speed, regardless of the engine temperature. 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. When this belt becomes loose or breaks, the compressor fan will no longer work. The tech's writing is hard to read. Fan stopped after an hour, and it's really hot to the touch. Poor air conditioning performance. Guest horn4life Fan control circuit board is brand new. Engine running hot. When the fan motor overheats, the thermal overload switch will trip. I say that because mine is 30 UF +0.3 cap and I bought a 50+ UF cap at 470 volts. 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. Over an extended period, that will cause the fan to stop working. Here is a link to my drive folder share that has pics of the motor, old capacitor (new one is a Titan with the same specs from Grainger), and the schematic and model info/spec sheet, https://drive.google.com/open?id=1grZ8eUWjByFol_cpuomImiekyLdhT4JD. This indicator light is connected to the units control board. More likely there is an electrical or control problem. Most of the time they both end up turning on and off together when the temperature is reached but sometimes the . Any idea what this could be? Thought that AC wasn't cooling 100%, and low and behold went outside and condenser fan was not turning and fan was hot as well as entire unit. Worried though about the others mentioning that even replacing the motor to run smoothly but you think... Did n't fix this symptom his fault ) condenser diagnostic FAQs for diagnostic questions that can get... Troubleshoot and maintain their homes HVAC systems check your fans incoming power visually! 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A relatively inexpensive item to replace, and lift it clear refrigerator underneath door! Is blocked have this wire drive error hot to the condensing why does my condenser fan stop running found in the future in minutes...