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). 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?. you could have a bad condenser fan motor. If not, the capacitor or the blower motor is not functioning properly. If the cooling fan motors burn out or fail, the cooling fans will be disabled. 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?. Problem is bound to arise whenever the condenser fan goes bad. The following are the signs and symptoms of a bad AC fan motor. This is to enable the condenser effectively convert gas into liquid and then keep the AC system operating effectively. The liquid refrigerant continues to circulate to the filter or desiccator, where the refrigerant is purified by absorbing all moisture and impurities. 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 If your refrigerator isn't getting cool, the fan is just one of many possible reasons. Unfortunately this condition could indicate a burned-out A/C or heat pump compressor motor. getting the fan off the old motor. A reduction in cooling is your first sign that something isn’t right. 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. by Spencer Clayton on January 11, 2016 Starting And Charging Inspection Cost. 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. Malfunctioning of the thermostat is the cause of the problem. 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. Since excessive heat will damage the vehicle’s parts over time, a bad relay must be replaced as soon as possible. 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 the fan were to malfunction, it could overheat both the air conditioning system and the internal combustion engine. The AC motor should react immediately when you switch the fun off. (See Table 1.) A bad ignition condenser can have several effects on your car. QUOTE=mdshunk]My flat rate book says that changing the condenser fan motor on that unit will cost $345. You might also check that the condenser fan is coming on when the engine gets to operating temperature. Slide it into the vents and gently push one of the fan blades. And since your fan is essential to keeping the condenser cool, the condenser may overheat. I'm soaking it in PB Blaster, but so far no go. Set screw is loose, I tried giving it a few good blows with a hammer and punch, won't budge. Keep in mind that the cost of an engine ranges from $300 to $700 depending on the vehicle, model year, and availability. In many cases, it will be a bad car condenser. 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. Bad Cooling Fan Relay Symptoms. 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. Heavy Static in the Radio If the condenser is not able to hold a charge, there will be significant sparking inside the ignition system. A condenser fan motor is part of your HVAC system that is located within the condensing unit. You might get away with less if a company uses time and materials. The blower motor in your furnace blows hot air through the ducts and into your home. When there is something wrong with the fan motor, it can overheat and cause problems with the HVAC system. If the condenser fan is defective, replace it. ... number of things. That should also eliminate noises traced to improper voltage such as too-low voltage and a motor unable to start. Service Location. It also saves electricity. When this happens, air flow reduces and so does cooling. The relay is … It moves air across the condenser coils to help cool the hot refrigerant coming out of the compressor. Worse, I can't drive it off, because the fan is close to the motor, no way to get to that side. You can likely match this motor up at a local motor shop or HVAC supply house, for about 75-100 dollars. 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. If the condenser ends up going bad, there are symptoms that would be displayed. Sometimes the inevitable happens. Reply: Bad Condenser Fan Motor. www.supercoolsliderule.com -- This video tutorial illustrates how to test and diagnose if a condenser fan motor is bad. This can leave the fan motor running. The most common symptom of a faulty cooling fan motor are cooling fans that do not come on. 2. Unfortunately this condition could indicate a burned-out A/C or heat pump compressor motor. This will usually happen when the engine is idle, and the vehicle is not moving. If it doesn’t come on check for 12vdc at the fan plug. When the fan motor is faulty, there will be several obvious signs: What Does a Condenser Fan Motor Do? A bad or faulty capacitor can exhibit many signs and symptoms. Your condenser fan motor may not show any signs at all that anything is malfunctioning. The condenser fan is in the machine compartment of the refrigerator next to the compressor. The condenser fan works similarly to other fans you have seen. If damage to the condenser results in restriction of refrigerant flow, the whole system will be less efficient. 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. 2) Hot Engine . The function of the condenser fan is to keep the condenser cool whenever it gets hot. Also, check the condenser coils to see if the coils are dirty-dust on the coils can prevent air from cooling the refrigerant. 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. 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