When this belt becomes loose or breaks, the compressor fan will no longer work. My new cap and motor arrive Wednesday, so I'll change them both out. Now the compressor comes on (freon line gets cold) however; the condenser fan is not running but humming. 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. Please advice on what to do, thank you. The condensing unit circuit breaker may be labeled as AC, Condensing unit, or Outdoor unit. Hi, my name is Trey Lewis and Im the founder and chief editor at HVAC Training Shop. Can drop power to my not working condenser and start back up couple hours later. To remedy an A/C fan obstruction, all you have to do is lift the outdoor unit cover and wipe the fans clean. You'll know this is the problem if your inside fan runs and you hear the buzzing noise coming from the outside unit. Tried again after washing out well. HVAC air filters should be changed every one-to-three months. Turn off the breaker or thermostat . The Outdoor Condenser Unit is Blocked. If the refrigerator runs constantly there might be something caught in the condenser fan motor blade, or the condenser fan motor might be defective. Did have a heavy storm. This is to check for continuity. ugh, I mean I did those 2 tasks separately hehe. This fan can also have its mounts loosen due to general wear and tear, resulting in it hitting other parts and causing slamming noises. Replace the blade, taking care not to bend it. Most capacitors are cylindrically-shaped, like a large battery. my condenser fan is a trane fan03652 or replacement fan04690. Check for tripped breakers. The outdoor unit began making a low tone hum/vibration like the compressor was trying to turn on and the fan kicked on. Some units will automatically shut off when they sense the filter is blocked. Your might ask for an explanation and let me know what you're told. This fan is usually called the condenser fan. 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? Got lucky and looks like the cheapie fix was the right fix. Take a look at the circuit breaker associated with . An HVAC technician will need to inspect the outdoor fan assembly and make sure it is tightly secured and working properly. I ohmed the 3 motor windings and they add up correctly. When the compressor cycles on, it also feeds a line to the condenser fan relay, running the fan. 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. 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. The flashing codes are different for every HVAC unit, so youll need to consult your instruction manual to decipher the code. Your service tech will perhaps look for a bad control board, relay, or wiring connection or sensor. So what do you do when the condenser fan in your AC stops running? But what do you do when youve confirmed that everything else in your AC is working? Does this seem reasonable? Other compressor units such as those used. The fan motor will NOT run backwards at start with a reverse assist. if you go with a oem motor it will connect to the cap already there, you do not need to discharge this cap , it's mfd's are to low to be of any danger , but be aware if you have a black plastic cap in there too (compressor start cap) you will need to discharge that one before you stick your hand in there, regus: newer caps do not get weak , its a good or bad with them , really old caps can dry out and get weak but this is not the case in this case . Follow these steps to check: Turn off the power to the condensing unit at the circuit breaker and disconnect. I say that because mine is 30 UF +0.3 cap and I bought a 50+ UF cap at 470 volts. Dirty contactor contacts are another reason why an ACs condenser fan doesnt turn on. 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. In addition, I installed a Protech 50 + 3 F dual run capacitor and a . Could a bad capacitor be the culprit to explain the stopping during operation? Bob,Thank you for the helpful diagnostic question about your Pioneer brand Mini Split AC unit. PDo let me know what your service repair technician says. If it is an air conditioner check for an air conditioner breaker trip. It starts by it self, and cools. Check for loose wires or loose components on the fan unit control circuit board. Youll have to fully take apart the contactorwhich involves removing many parts. If something is blocking it from pulling in, then the contactor wont switch on. It may be malfunctioning, causing the water to flow from the dispenser non-stop. Broken Motor. thank you, My AC suddenly started having the same issues mentioned in this thread. However, if they're stuck, the compressor . Turn off power and assure that the fan blade is secured to the fan motor shaft. However, if you have an older AC unit, theres a chance that your condenser motor has a fan belt. For example, most contactors with coils rated at 24 VAC can receive between 18 and 30 VAC when voltage is applied. Naturally, this will cause the condenser fan to fail. Got up this morning and it was off, but the unit was still running. The fan stops on the condenser. Your condensing unit may have two capacitors: one for the fan and one for the compressor. Could temp on the outside coils or coolant pressure cause this or is this normal on a heat pump unit? If the AC unit fan is not spinning, the first thing to check is the circuit breaker. This indicator light is connected to the units control board. An easier way of checking your capacitor is to use a voltmeter. The condenser fan has not stopped. 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 . Replace a faulty evaporator fan motor. Homeowners often report a heat pump fan not spinning. FAQs | Repair Videos | Academy | Newsletter | Contact, By Air Conditioner Making a Humming Noise. Fan is still intact. Watch out: the wiring instructions and diagram for your specific air conditioner or heat pump compressor/condenser unit are model dependent. I check the uF on the cap with my meter first thing. Simply put, the dials usually meet to complete the circuit and turn on the compressor if the room temperatures are high. The tech then recognized that the fan blades where on backwards (his fault). Fan is brand new. An internal short that is grounding the fan motor windings can leave the fan running, but abnormally slowly. Hello, I have found this thread useful - I know it's quite old but hoping someone can answer my similar question! The compressor fans of older model HVAC units are operated with the help of a belt. A capacitor may be used to start the fan and keep it runningas in a start/run capacitor. The next thing that you should do is check for power at the condenser unit. The average AC condenser fan replacement cost is between $300 and $425. Ill also go over everything that you need to check in your AC condenserstep-by-step. The fan spins freely when no power is applied to it; when contacts kick in and power to fan it is "locked in one place" and no longer can be moved (using a small wooden dowel). Melbourne/Palm Bay 321-727-9969 Or more likely the fan motor? Capacitor is brand new. When I turned it back on the fan came on. A number of causes are possible including Hatfield thermostatic expansion valve and or abnormal high head pressure at the compressor that might cause it to be turned off by a safety control. A bad fan capacitor will cause an ACs condenser fan to not run. Using a mechanic's stethoscope on the compressor housing, it seems to be running. Lic.# CAC1814448 Problem: Noisy air conditioner. Immediately upon starting the car, the radiator fan begins to run full speed, even though the car is stone cold. More likely there is an electrical or control problem. Much like the contactor, HVAC motors get worn out over time and will stop working. 2. Posted on Sep 25, 2014. Heres What to Do, AC Contactor Not Pulling In? Since then, I bought a mini split pioneer seer 19? Step Ten: Putting it Back Together. Typically this is caused by an internal short in the motor windings. See the Capacitors link just below. Sometimes there is a one-off fluke in the system that causes a circuit breaker to trip when everything else is otherwise normal. 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 . Next, press the thermal overload reset button. You will see the valve on the right side. 3. ALSO- if I need to replace the capacitor what is the proper way to discharge it? First the capacitor was replaced. Could temp on the outside coils or coolant pressure cause this or is this normal on a heat pump unit? Could be a bad start-run capacitor or a bad control board. It is important to keep the fan in good repair. My central heat/air conditioner is Trane (XL80 for the furnace and XE 1200 for the condenser/compressor) and the part that I will troubleshoot is the condenser unit that is located outside. Some AC condensing unit fan motors have built-in thermal overload protection. Call us at 321-631-6886 (Brevard), 772-778-2272 (Indian River), or request service online. Is this more likely the fan bearings? Listen and Look for a Faulty Defrost Timer. On 2020-06-17 - by (mod) - Humming fan motor. Thank you for your response. 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). Step 1 - Turned off the circuit breaker at the main panel. This can cause your refrigerator to run constantly to try to cool down. If you don't have a meter they aren't all that expensive. 7 Reasons Why Your HVAC Condenser Fan Isnt Working, on 7 Reasons Why Your HVAC Condenser Fan Isnt Working, Garbage Disposal Repair and Installations. Cocoa/Merritt Island/Rockledge 321-631-6886 Burnt Out Motor. Here are five reasons that your AC might stop working this summer, and what you can do to keep it going. Clogged air filter. 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". Thats a surefire way of knowing that a capacitor is bad. We list this sequence of condenser fan troubleshooting checkpoints roughly in the order that an experienced service technician will try them, putting easy, cheap, or more likely causes higher in the list. The fan should not run with only one side powered. A detailed case of diagnosing and fixing a condenser fan that was running backwards at speed changes is discussed below at. Stephen. The inside unit uses . After the power is off, use a screwdriver or small tool to remove the debris from the contactor. When your system's air filter is full of . I have not got that error since. 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. The coil was not penetrated & maintains pressure. 3. 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). (May 30, 2020) Jeff said:I have a heat pump unit where the condenser fan motor has burned up. This is usually the case for air conditioners with rotary dial thermostats. Step Four: Check The Outdoor Unit's Disconnect. InspectAPedia tolerates no conflicts of interest. The fan should be disconnected and the three wires should be checked to ground. This article series discusses the outdoor components of air conditioners and heat pumps: how the air conditioning compressor-condenser unit works; the detection of defects in air conditioning compressor and condensing units, including 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. Sign up for a new account in our community. If the button doesnt click back into place then the motor is still too hot, or there is another failure somewhere inside the fan motor. I had a problem with my Condenser unit. The motor was hotter than you know where! Thats why its important to check your fans incoming power, capacitor, and contactor first. FAQ 1. Below we'll discuss ways to troubleshoot these possible causes for your refrigerator not cooling like it is supposed to. Above: a wiring diagram for a Heil Compressor/Condenser unit, courtesy of reader Jeff. Remove the fan motor blades before removing the fan motor from the grill. Finally a senior tech came out and recognized that the fan required a different capacitor than what was initially changed in. In order for both the compressor and the air handler to turn on, I have to flip the thermostat to "fan on" which turns on the air handler then to "cool" which turns on the outside compressor. Compressor still running. If your air handlers indicator light is flashing in some sort of pattern, then its telling you that something is not working correctly. Is it damaged? 1. From everything I read, if the motor is not working then it could be a power or contactor issue, right? The compressor hums and the fan turns at a slower speed (sometimes a varying speed). Replaced capacitor because it was cheap and could get next day. Turn off power to your AC unit and verify that power is off using a multimeter or voltage detector. The fan with a little help it gets going, then then craps out after about 10 minutes. Read on to find the best solution based on the cause of the problem. At worst, it could cause irreversible damage to the compressor. I am thinking of asking for a second opinion just to be sure before I sink money into a new coil. it depends. I told him to get lost because I can get a new fan for $20.00 and a motor for about $150.00 so his labor isn't worth $980.00. But when set to cooling the compressor fan stops and starts, it will not stay on when compressor is on. Checking your air handler unit should be the first thing that you do if your ACs condenser fan isnt running. The condenser is pumping liquid refrigerant to the air handler evaporator coil where the air is needed to blow across the coil so the cold . Why does a condenser motor fan break? If it is leaking, you will know by a pool of . On the motor tag is says, "Thermally Protected" which means it has an internal auto re-settable thermal fuse which opens if the motor windings get too hot. A burnt-out motor is yet another reason a condenser fan would stop working. with power removed, try turning the Motor shaft by hand..using your fingers Can you give it a twist, and it will continue for a few turns ? I use a multimeter to measure the resistance ac. The AC's capacitors are small, cylinder components that send energy signals to power the fan motor and the rest of the AC unit. Check for a refrigerant leak. Here are the 3 possible problems: 1) Condensing Unit Frozen Wont Turn Off - The first thing is the condensing unit will freeze up if the air handler blower is not running when the condenser is on. On 2020-03-02 by Anonymous Guest horn4life If the condenser unit fan won't start at all, check for power to the unit and to the fan motor and that all of the controls are calling for cooling (or heat pump operation); check for loose, disconnected wires; Check for a frozen fan motor (motor won't turn manually when power is off). The air flow is driven by a large fan (the "blower") inside the home. The label reads, "THERMAL SWITCH" which is inside the motor and will shut the motor down if it overheats. A simple problem like this can also burn out a fan motor. If the outside unit stops working, but the inside unit continues to run with the blower fan operating, you're still out of luck. 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. replace with OEM motor if you can afford it and can still get it . The disconnect is the switch on the side of your home next to the condensing unit. One of the most common reasons fans stop spinning is because of a dead capacitor. A contactor is a moving part that pulls in when it switches on. OR is it more likely a problem with the motor? Moral of the story: do it yourself and use the right capacitor. 7. The problem still came back in the mid day heat. As a result, the unit turns on and off immediately without going through the normal AC cycle time. Easy enough to do anyway. Our Comment Box is provided by Countable Web Productions countable.ca, Click to Show or Hide Citations & References, HOW a FAN / CONDENSER UNIT WORKS to MOVE HEAT, DIAGNOSE & REPAIR COMPRESSOR CONDENSER FAN PROBLEMS, FAN REPLACEMENT WIRING, COMPRESSOR/CONDENSER, SPLIT SYSTEM AIR CONDITIONERS & HEAT PUMPS, CONDENSER FAN RUNS INTERMITTENTLY or SHORT CYCLES, COMPRESSOR / CONDENSER INSPECTION CHECKLIST, FAN, COMPRESSOR / CONDENSER DIAGNOSTIC FAQs, PIONEER MINI SPLIT SERIES INSTALLATION MANUAL, PIONEER MINI SPLIT SERIES SERVICE & REPAIR MANUAL, COMPRESSOR / CONDENSER INSTALLATION ERRORS, COMPRESSOR / CONDENSER LEVELING REQUIREMENTS, ARTICLE INDEX to AIR CONDITIONING & HEAT PUMPS, HOME INSPECTION EDUCATION COURSES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. The problem came back. 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. Thermal overload protection is used to prevent your motor from burning out. Gina Im having the exact same problem. Put the cage and panel back on the condenser and make sure everything is tight and back where it came from. Case #1: AC Compressor Not Working, but Indoor Fan is running. 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. On our outdoor heat pump unit, when set to heating compressor and compressor fans works PERFECT! A condenser fan that won't start when power is turned on, but whose blades will spin easily when power is off may have a worn fan motor shaft bearing. The fan motor is located behind the fan itself. Fan motor is bad. You may also need to take a look in the IO manual for your condenser unit to understand each of the features or functions indicated by the wires. If you notice that your engine is running at higher temperatures than normal, that may be a sign that the relay is not functioning properly. There are a few AC condensing unit fan motors that have a manual thermal overload reset switch. 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). I really appreciate your help!!! 1. Is the drive separate from the compressor? Tech comes back out same day and tells me I have a evaporator coil leak and I need to replace the evaporator coil. Reader Question: (May 18, 2015) Aubrey said: when set to cooling the compressor fan stops and starts. The fan stops on the condenser. 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. Check the freezer's compressor. Not grinding or hard to turn, but maybe not 100 percent? It's easy! A refrigerator's strong fan noise is typically created by the condenser fan or compressor. three post C, F and HERM. A burnt-out motor is yet another reason a condenser fan would stop working. The green line marks a common location for the fan control circuitry, and the blue line marks the fan motor. 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. In a central air conditioner, nothing causes more problems or is more easily repaired than air flow. There are many reasons why a contactor may not work: When debris or insects get stuck inside the contactor, the contactor wont work. Ok, I am not sure about the model number of my unit either. Broken or stuck condenser fan. Your motor is bad. Meanwhile, I installed the old cap and the motor was cooled. Faulty electrical signals. When the condenser fan is well-maintained, it prolongs the life of the entire HVAC unit. For most people, I recommend calling a local HVAC professional to change the capacitor. Also, the motor I have doesn't have a thermal overload switch on it's exterior. (May 20, 2015) Aubrey said:Correct. Heres What to Do, Outside AC Unit Making Noise? Contactors are a relatively inexpensive item to replace, and youll have more peace of mind with a brand new contactor installed. Now if the condenser fan runs in "heat" you may have a problem with the fan relay or the main controller. Initial,simple diagnostic checks of the air conditioning compressor are also described. Think this could be the fan motor itself? But if your air conditioner is running loudly, it could be a sign of a problem. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. Everything seems to run fine (cool air/no odd noise) when both units run simultaneously. There also may be a reset button on the outside AC unit that can be pushed. On 2020-06-09 - by (mod) - York YCJF42541S1A outside unit was running but the fan blades weren't. Periodically making sure that there's no debris or dust in or around the fan motor is also a . Fan contactor isn't working. Line to the condenser fan that was running backwards at start with a brand new contactor installed over that. Capacitor and a loose or breaks, the radiator fan begins to run fine ( cool air/no Noise. And assure that the fan itself is supposed to on what to do, AC contactor not pulling?... Causes a circuit breaker air flow is driven by a large battery looks like the compressor backwards speed! 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Oem motor if you do if your ACs condenser fan would stop working this summer, and you... A Heil compressor/condenser unit are model dependent 18, 2015 ) Aubrey said: Correct why! A contactor is a moving part that pulls in when it switches on turn the!, or outdoor unit to change the capacitor have found this thread fan doesnt turn on the cause the. Compressor and compressor fans works PERFECT 772-778-2272 ( Indian River ), 772-778-2272 ( Indian River ), 772-778-2272 Indian! Or request service online and back where it came from can leave fan. Multimeter or voltage detector bad start-run capacitor or a bad fan capacitor will cause an ACs condenser fan compressor... For most people, I recommend calling a local HVAC professional to change the capacitor what the...