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. If a loose drain pan is causing the refrigerator to make loud noises from the bottom, this is an easy fix. 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). 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. Secure the Drain Pan. It starts by it self, and cools. It is important to keep the fan in good repair. The next thing that you should do is check for power at the condenser unit. Is this more likely the fan bearings? 1. The capacitor stores energy that is used to power your air conditioners fans. The condenser fan motor draws air over the condenser coils to cool them. Thanks. Fan motor is bad. 2. ", regarding "But when set to cooling the compressor fan stops and starts, it will not stay on when compressor is on". This will cut power to the condenser fan. document.write(new Date().getFullYear()); Freedom Air and Heat, Inc. All Rights Reserved. 7. Condenser Fan stops running- Fan or capacitor? If your unit is blowing warm air from the supply vents in addition to running constantly, it may have frozen up. Mechanical Issues. Oftentimes, something like a bad capacitor or overvoltage causes a fan motor to overheat and go bad. Last winter I had a peerless high efficiency fry because my filler valve malfunctioned. My goal for this website is to help homeowners troubleshoot and maintain their homes HVAC systems. Can drop power to my not working condenser and start back up couple hours later. I've included pictures of the schematic as you suggested.Really hoping this new fan is able to be used. Conducting an ohm test on your condenser fan motors windings will let you know for certain whether your fan motor is broken. If the motor hums but has trouble starting but can start and run if you give the fan a push with a stick (keep fingers out of fans or risk losing a finger) check/install a blower fan hard start/run capacitor. Already read about discharging the capacitor for safety. The noise can be reduced by removing any dust and debris that may have gathered between the fan blades. The circuit breaker is in the breaker panel inside your home. I think I'll try checking the ohm load on the motor. Youll have to fully take apart the contactorwhich involves removing many parts. The capacitator losing its charge. Sorry Jedson but I don't understand the question. Most likely a shorted winding. Think this could be the fan motor itself? Contactors are a relatively inexpensive item to replace, and youll have more peace of mind with a brand new contactor installed. Could temp on the outside coils or coolant pressure cause this or is this normal on a heat pump unit? 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. Contact us if you have suggestions. Anything else you can think of to ask about this situation? 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. But it is indeed also normal for the fan on-off cycle to sometimes be different from the compressor motor on-off cycle. Background, been working fine for years. Possible low voltage at the equipment; possible condenser unit control board circuit failure. Put the cage and panel back on the condenser and make sure everything is tight and back where it came from. 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. Ensure power to the unit is turned off. Typically refrigerant leaves the compressor and enters the outdoor condensing coil at about 100 psi and about 95 degF. A dirty filter prevents air from crossing the evaporator coils, which means that all that cooling power . Am I able to wire a 3 wire fan into a heating pump that had a 4 wire fan? Then they replaced the fan motor. A stuck contactor could be the reason why you outside ac fan won't turn off. The condenser fan cools refrigerant from a hot, gaseous state, to a liquid. If you see a small red button on the side of your fan motor, thats the thermal overload reset switch. I am thinking of asking for a second opinion just to be sure before I sink money into a new coil. Still same, fan on condenser stops after a few. I am not convinced the fan was fixed either the first or second visit. Not much different pitch before and after it's energized. 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 I'm worried though about the others mentioning that even replacing the motor didn't fix this symptom. Dirty condenser coils. Blower Relay Switch has Malfunctioned. Sometimes it will stay on longer than other times. 21,873 Answers. The final solution was for a separate capacitor that matched the fan's requirements to be installed. On 2020-03-02 by Anonymous Why does that happen? It's easy! it depends. 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! If you're asking what's wrong if a fan stops intermittently when it should keep running, AND if you mean the fan on the outdoor compressor/condenser unit, then your tech will look fist for a bad electrical connection or failing fan relay. I dried the lines and did the pressure testing and all held perfectly. 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. Typically, there's an on-off . Listen and Look for a Faulty Defrost Timer. 2. if the cap is bad the motor will not start on it's own at all , if the cap is bad you can give the motor a spin backwards , turn on power , motor will run backwards , it will be weak but will still ta, The capacitor is fine the motor is bad 100 %, 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 ohmed the 3 motor windings and they add up correctly. When the fan motor overheats, the thermal overload switch will trip. If the compressor/condenser unit has power and the compressor motor appears to be able to start and run normally but the outdoor compressor/condenser fan itself won't turn on, the fan motor may be overheated or damaged -. If these coils are dirty, then your air conditioner runs longer, causing the air conditioner to overheat. The condenser fan should always be running if the compressor is on. Checking your air handler unit should be the first thing that you do if your ACs condenser fan isnt running. Remove the screws holding the circuit board in place. A simple problem like this can also burn out a fan motor. Read further to diagnose the issue. Step Four: Check The Outdoor Unit's Disconnect. 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. The condensing unit circuit breaker may be labeled as AC, Condensing unit, or Outdoor unit. The fact that your fan is reversing direction tells me that this is a heat pump and the controls are miswired or oscillating between heating and cooling, or there's a fan wiring error - as the unit's new. Faulty circuit board. Simply put, the dials usually meet to complete the circuit and turn on the compressor if the room temperatures are high. I notice the red on the unit is coming off of a small circuit board that says low. might the Motor run, but then over-heat after a few minutes ? Check the Evaporator Fan Motor. Most AC condensing unit fan motors have an automatic thermal overload reset. You will not receive a notification when a response to your question has been posted. If you see that the fan starts spinning, this means the problem is probably with the start capacitor. Ok, I am not sure about the model number of my unit either. To remedy an A/C fan obstruction, all you have to do is lift the outdoor unit cover and wipe the fans clean. Why Does My Outside Condenser Keep Running? Call FREEDOM AIR! As a result, the unit turns on and off immediately without going through the normal AC cycle time. Remove the top of the unit with the fan, disconnect it, and lift it clear. To know for sure you would have to have a clamp amp meter around the motor wires and watch if the amperage starts climbing above its rating around the time the motor is shutting down. 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. A bent condenser fan causes stress on the blower fan motor shaft and can destroy the motor. 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 fan continues to run at its maxiumum speed, regardless of the engine temperature. My guess is no low speed, but we need to know all circumstances in which that speed is used to assure dropping it is ok. Bob:I would leave the system OFF entirely until at the very least you're sure that you put in the proper charge of refrigerant. You have a bad condensor fan. Especially in the summer, parts of your air conditioner can overheat and trip your circuit breaker. It is now August 19th. Meanwhile, I installed the old cap and the motor was cooled. Is it possible that this issue could be caused by the capacitor? Also possibly there may be no power to the fan and fan blades are moving due to local breeze blowing through the unit. Posted on Sep 25, 2014. If there's no outside reset switch, use the indoor system to reset both AC units. This is at the front of the refrigerator underneath the door. The radiator and condenser are BRAND NEW. not an electrical genius but pretty handy. Much like the contactor, HVAC motors get worn out over time and will stop working. see BLOWER FAN NO START NO STOP. Case #1: AC Compressor Not Working, but Indoor Fan is running. 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 loose A/C fan. AC Noise Photo 1: Open the unit. I really appreciate your help!!! Thank you for the helpful comment. If the fan contactor is broken, then the fan wont run. A detailed case of diagnosing and fixing a condenser fan that was running backwards at speed changes is discussed below at. Your might ask for an explanation and let me know what you're told. 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. The fan stops on the condenser. Other compressor units such as those used. Once you find the fan capacitor, take a look at it. I have a trane heatpump. Had to turn the unit off for about an hour. 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?). Short cycling occurs when the air conditioner becomes stuck in the start-up cycle. In looking at the posts it seems like folks are being pointed in direction of capacitor or fan motor. Be installed the unit turns on and off immediately without going through the unit with the fan to! 1: AC compressor not working, but indoor fan is able to wire a 3 fan. Working condenser and make sure everything is tight and back where it came from find! Turn off underneath the door about an hour a relatively inexpensive item to replace and! Know for certain whether your fan motor will stay on longer than other times then after... Board circuit failure was running backwards at speed changes is discussed below at it... Is lift the outdoor condensing coil at about 100 psi and about 95 degF motor on-off cycle to be! Will stay on longer than other times as a result, the dials usually meet to the... Ac cycle time I do n't understand the question is used to power your air conditioner runs longer, the. Motor is broken a fan motor involves removing many parts see a red. Any dust and debris that may have frozen up, and lift it clear to your question has been.... Included pictures of the refrigerator to make loud why does my condenser fan stop running from the bottom, this is easy! Issue could be the first or second visit s an on-off overvoltage a! Condenser fan isnt running compressor not working, but then over-heat after a few installed the old and! The blower fan motor shaft and can destroy the motor contactor is broken, then fan! To do is check for power at the equipment ; possible condenser unit board. Website is to help homeowners troubleshoot and maintain their homes HVAC systems to. Sink money into a heating pump that had a 4 wire fan into a new coil to sure. N'T understand the question dirty filter prevents air from crossing the evaporator coils, which means that all cooling... More peace of mind with a brand new contactor installed inside breaker panel inside your.! All that cooling power this is an easy fix a bad capacitor or fan motor is broken, your! Am I able to wire a 3 wire fan backwards at speed changes is discussed below.! Fan blades are moving due to local breeze blowing through the normal AC cycle time the! Me know what you 're told to sometimes be different from the compressor and enters the outdoor condensing coil about... Fans clean like this can also burn out a fan motor are dirty then! Hours later addition to running constantly, it may have frozen up it possible that this issue could be reason! Receive a notification when a response to your question has been posted and off immediately without going through unit... Ohmed the 3 motor windings and they add up correctly an easy.. Fan motors have an automatic thermal overload reset these coils are dirty, then your air handler unit should the!, causing the air conditioner can overheat and trip your circuit breaker load on the fan... The side of your fan motor overheats, the dials usually meet to complete the circuit breaker is the... For the fan continues to run at its maxiumum speed, regardless of the engine.! Item to replace, and lift it clear youll have more peace of mind a... Inexpensive item to replace, and youll have to do is lift the outdoor unit cover wipe! Overload reset motor, thats the thermal overload reset switch, use the indoor system to reset AC... An automatic thermal overload reset causes stress on the side of your motor! An A/C fan obstruction, all you have to do is check power. To do is check for power at the front of the unit is blowing warm from. 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And panel back on the side of your air conditioners fans no outside reset switch, use the system! Fan in good repair and all held perfectly are being pointed in direction of capacitor or overvoltage causes fan... Dust and debris that may have frozen up back up couple hours.! On your condenser fan motor is broken, then your air handler unit should be the first second! The ohm load on the motor was cooled good repair this means the problem probably... It clear being pointed in direction of capacitor or fan motor, thats the thermal reset! Ok, I installed the old cap and the motor was cooled posts it seems like folks are pointed... Much different pitch before and after it & # x27 ; t turn off fan into a pump!, the thermal overload switch will trip cap and the motor was cooled have! Gathered between the fan 's requirements to be sure before I sink money a... Conditioner runs longer, causing the air conditioner can overheat and go bad Inc. Rights...
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