It's an aluminum collar on the fan, steel shaft on the motor. When there is something wrong with the fan motor, it can overheat and cause problems with the HVAC system. Most condenser fan motors have been designed to operate at temperatures up to around 150F. One of the most common signs of a failing AC condenser fan motor is reduced cooling. Be aware of the following signs and symptoms of a bad AC fan motor. I'm soaking it in PB Blaster, but so far no go. A week later I found out I could have gotten the fan motor for $63 and done it myself. A bad fan motor can also cause the fan to turn but only abnormally slowly. If it doesn’t come on check for 12vdc at the fan plug. The Fan Does Not Stop Running. Also, check the condenser coils to see if the coils are dirty-dust on the coils can prevent air from cooling the refrigerant. Malfunctioning of the thermostat is the cause of the problem. Unfortunately this condition could indicate a burned-out A/C or heat pump compressor motor. This is to enable the condenser effectively convert gas into liquid and then keep the AC system operating effectively. If the condenser fan is defective, replace it. And since your fan is essential to keeping the condenser cool, the condenser may overheat. The air condenser has a fan which keeps it cooled down. ... number of things. This can leave the fan motor running. Since excessive heat will damage the vehicle’s parts over time, a bad relay must be replaced as soon as possible. When this happens, air flow reduces and so does cooling. QUOTE=mdshunk]My flat rate book says that changing the condenser fan motor on that unit will cost $345. www.supercoolsliderule.com -- This video tutorial illustrates how to test and diagnose if a condenser fan motor is bad. A reduction in cooling is your first sign that something isn’t right. SELECT YOUR VEHICLE. Unfortunately this condition could indicate a burned-out A/C or heat pump compressor motor. When the fan motor is faulty, there will be several obvious signs: According to Repair Clinic, other possible reasons include dirty evaporator coils, a faulty thermostat or a bad evaporator motor (compressor).A loud blowing sound from the motor doesn't mean it's bad either. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. by Spencer Clayton on January 11, 2016 Starting And Charging Inspection Cost. If your fan does not stop even after switching off that is a direct sign that the AC motor is bad. AC Fan Doesn’t Start Even though you have the AC turned on, the fan does not start. Though considered a single component, it’s made up of several parts, such as a motor, fans, tubes, condenser coil, circuit board, and a … There could also be a problem with the fan itself. A bad ignition condenser can have several effects on your car. This will usually happen when the engine is idle, and the vehicle is not moving. If you suspect the issue is the motor, read below for signs and symptoms that the AC fan motor is bad and simple ways to troubleshoot. Bad Cooling Fan Relay Symptoms. 9 Posts . Your condenser fan motor may not show any signs at all that anything is malfunctioning. The motor powers the fan, which is a series of blades that turn to create wind. To figure out if you have a bad A/C condenser on your hands, look for the following signs: Symptom #1: Air conditioning isn’t as cold as it should be. A failed condenser fan motor can inhibit freezer cooling because air doesn't move across the condenser coils to cool the refrigerant before the refrigerant enters the evaporator. A condenser fan motor is part of your HVAC system that is located within the condensing unit. If damage to the condenser results in restriction of refrigerant flow, the whole system will be less efficient. Bad A/C Condenser Symptoms: 3 Common Signs. A combination of fern leaves and lint can partially block the condenser’s airflow, which causes high condenser pressures and inefficiencies. For example: Let’s say an R-134a air-cooled condenser is running at a condensing pressure of 147 psig (110?F) at an ambient of 90?. Replaced condenser fan motor with a universal 4 wire motor and old 45/5 capacitor with new 45/5 capacitor and unit will not run at all. So I turned off the system and called installer for service (same company used for maintenance). I could hear the compressor humming and the unit was radiating heat like a pizza oven, never felt heat like that coming from it before. Heavy Static in the Radio If the condenser is not able to hold a charge, there will be significant sparking inside the ignition system. An AC condenser is the part within an air conditioning unit that’s responsible for cooling down and condensing incoming refrigerant vapor into a liquid state. Open the access panel to the furnace using a screwdriver. Worse, I can't drive it off, because the fan is close to the motor, no way to get to that side. 2) Hot Engine . Reply: 1. But with a bad capacitor, your blower cannot function well and may put your family’s comfort at risk. It also saves electricity. A slow condenser fan (or air handler unit fan) could be caused by a bad start-run capacitor. This is a Delta T of 20?. The relay controls the engine’s cooling fans as well as the fan for the A/C condenser. The condenser fan works similarly to other fans you have seen. The condenser fan is in the machine compartment of the refrigerator next to the compressor. Slide it into the vents and gently push one of the fan blades. Its capacitor works like a battery and stores the energy needed by the blower to work properly. Since the condenser fan is visible from the top of the outdoor condenser unit, you can easily tell if it’s working. If the signs above apply to your situation, walk outside toward the air conditioner’s condenser unit. If you suspect your AC fan motor is bad and needs to be replaced, read on to find out the common signs and symptoms of a bad AC fan motor. Set screw is loose, I tried giving it a few good blows with a hammer and punch, won't budge. Then, you have a larger repair on your hands. The following are the signs and symptoms of a bad AC fan motor. One of the first symptoms commonly associated with a fan relay is an AC that blows warm air. Problem is bound to arise whenever the condenser fan goes bad. you could have a bad condenser fan motor. Noticed over the weekend that the exhaust fan on top of the condenser unit was not running (single speed Trane XR16 4TTR6061C1, installed about 3 years ago). Keep in mind that the cost of an engine ranges from $300 to $700 depending on the vehicle, model year, and availability. It may be engaging or coming on too late. it wont be visible usually but if you feel any give in the shaft then the bearings are bad. The refrigerant is cooled before it moves through the expansion device and into the evaporator. Service Location. Sometimes the inevitable happens. The AC motor should react immediately when you switch the fun off. Had exactly the same problem where the fan motor went bad and it caused my AC to cycle on and off on over pressure. If your AC fan is not spinning, find a long, thin object (a stick, screwdriver, pliers). Look through the vents for the fan on top of the unit. The blower motor in your furnace blows hot air through the ducts and into your home. getting the fan off the old motor. Symptoms of Bad or Failing Points & Condenser If your vehicle runs rough, the engine will not fire, or the vehicle will not start at all, the points and condenser system may be failing. The liquid refrigerant continues to circulate to the filter or desiccator, where the refrigerant is purified by absorbing all moisture and impurities. You might get away with less if a company uses time and materials. You might also check that the condenser fan is coming on when the engine gets to operating temperature. These symptoms of AC compressor failure can happen due to failing electrical components or even a fan motor that has become dislodged and is rattling around inside the condenser unit. Usually a bad or failing cooling fan motor will display a few symptoms that can alert the driver of a potential problem that should be serviced. hold the shaft and move it side to side. The relay is … The condenser fan must operate for your ac to blow cold air, especially when the vehicle is not moving. Idk what's wrong and can't figure it out it ran fine other than a bad motor now it doesn't do anything. Bad Condenser Fan Motor. Sound Turn up the thermostat for the furnace, and wait for the furnace blower to start up. If your refrigerator isn't getting cool, the fan is just one of many possible reasons. A slow condenser fan (or air handler unit fan) could be caused by a bad start-run capacitor. A bad or faulty capacitor can exhibit many signs and symptoms. 1. You can likely match this motor up at a local motor shop or HVAC supply house, for about 75-100 dollars. That should also eliminate noises traced to improper voltage such as too-low voltage and a motor unable to start. What Does a Condenser Fan Motor Do? If the cooling fan motors burn out or fail, the cooling fans will be disabled. That ought to eliminate a failing compresor motor and also loose condenser unit parts such as a grille, motor or unit isolation feet, mounting, piping supports, failing contactor relays, bad fan motor, or other loose parts. If not, the capacitor or the blower motor is not functioning properly. Clean the condenser coils if dirty. Unfortunately I was pressed for time and took it to an AC guy in Pensacola that replaced the fan to the tune of $240 for the fan and 175 for labor. The most telltale signs that there’s an issue with the fan motor are: The cooling fans won’t turn on; The fan turns on when the AC is running, but the blades rotate slowly It moves air across the condenser coils to help cool the hot refrigerant coming out of the compressor. Condenser Failure. This can leave the fan motor running.A bad fan motor can also cause the fan to turn but only abnormally slowly. Look out for these signs of a bad condenser fan motor or blower motor. However, a problematic condenser fan motor may also show other symptoms that can’t be visually detected. (See Table 1.) Discussion Starter • #1 • Jun 29, 2014 (Edited) after it shot out on me I found a new motor but its 1/3 hp instead of 1/4 but everything else match's up. Replaced condenser fan motor and capacitor now unit won't start but indoor fan will blow. The electric charge and the magnetic interference that it creates will cause a significant amount of static in your radio. If the fan were to malfunction, it could overheat both the air conditioning system and the internal combustion engine. best way to check bearing is to take the condenser fan motor (with power off and double checked with a meeter) have the moror sitting with shaft up. The function of the condenser fan is to keep the condenser cool whenever it gets hot. Cooling fans do not come on. At the condenser the temperature of the medium is very high, the fan blows the condenser, the vapor liquid is cooled, condensed into a liquid under high pressure and low temperature. If you have voltage and the fan isn’t coming on then your fan motor is bad. 2. However, you should have it fixed before strain on the system leads to compressor failure. If the condenser ends up going bad, there are symptoms that would be displayed. The symptoms of an ignition coil going bad are bad fuel economy, backfiring, starting problems and engine misfiring. 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