While it may make sense since it helps to circulate air and keep things from getting stuffy, it may actually be costing you more money in the end. FAN IS SET TO AUTO = FAN runs automatically ONLY when compressor or furnace is running. Ok, so I have the thermostat set on 68 and noticed the system is just running and running and running but not getting up to the temp setting. It may seem logical to think that a fan for an air conditioner is the same as a fan … It’s an ages-old debate: does it do any good to run your blower fan in your home without turning on the air conditioner itself? When control power is applied to the contactor holding coil, the contacts should pull in, and the compressor should run. Checking and Replacing the AC Contactor. These two parts work together to cool your home, but don’t always turn on and off at the same time. When the fan is running the air that is coming out is somewhat warm, but as soon as the compressor comes on … Thermostat has nothing to do with the condenser fan motor overheating. When your fan is set to AUTO on your thermostat, it will only run when the cooling component of your AC is running (when your AC system has conditioned air to blow throughout your home). In other words, when the compressor runs the condenser motor should also run. Despite hearing the sound of the AC turning on, your house is not cooling down as it used to. The fan on my Trane outside air conditioning unit is always running. Any advice?? "Radiator fan does not run at all, but condenser fan runs with A/C ON Radiator and condenser fan circuit troubleshooting A (see page 10-22). Both radiator fans should always run when the AC compressor is engaged. One problem that you may experience with your outside air conditioner is when the fan does not come on. Here is the start of the problem: Friday works fine went to bed got up Saturday house is 84 degrees, always keep thermostat at 74 year round. The only way to stop it is when I flip off the power at the breaker box. If the fan is not running it will not be able to remove the heat. Posted by 2 months ago. It's normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops, but your fan shouldn't run for hours on its own. The house stays nice and cool but the fan doesn't turn off even when I turn off the a/c. When the AC is switched ON (Compressor), the Radiator Fan also switches ON (even though the Engine Temperature is at C) along with Condenser Fan. I got the AC Blower Motor Assembly replaced on Friday at Local Electrician. It’s easy to understand what an air conditioner is supposed to do, but sometimes knowing what each function does can get complicated. Shut the system off. After some investigating, you determine that your outside AC unit isn’t running but the inside is. The fan in your AC system can run separately from the cooling component of your AC. Even if the stat is in a bad location or has no short-cycle protection, it does not have any control over the condenser fan motor directly. Your HVAC fan should turn on and off with the rest of your heating and cooling system. Condenser Fan Run But Not The Compressor Motor by: Mel It has been very hot in S.E Michigan the last few months Central air unit working fine all along cools nicely. 600/-. The unit is calling for cooling, runs for 20 mins before the condenser fan overheats and turns off, compressor continues to run. Example Start Run Capacitor On Amazon. The condenser fan should run whenever the compressor is running. Close. The contactor is essentially a switch that controls the compressor and the condenser fan motor. The fan mode and switches are one such example. The condenser fan motor is what runs to turn the fan blades and blow air across the condenser coil, where it cools the refrigerant from a hot gas into a liquid. Example Condensing Fan Motor On Amazon. I have a Carrier heat pump which in which the outdoor fan was replaced just over 3 years ago...it had burned out. Sign in to reply. A brief initial loss of rpm as the AC comes on is normal. The refrigerator condenser fan plays an essential role in the refrigeration cycle, but not all refrigerators have one. Condenser fans draw outside air into the condenser. Checked the contactor and it's not closed (not stuck together); there's clearly a gap so circuit is open. 0. My 2013 Hyundai i10 has one fan and as far as I can see one coolant temp sensor. Test all fuses with a test light .. Condenser fan motors all have a temperature stipulated by the AC manufacturer at which it can operate safely and problem-free. When I turn on the ac the fan works and keeps the car cool. Fasco D7909 5.6-Inch Condenser Fan Motor, 1/4 HP, 208-230 Volts, 1075 RPM, 1 Speed, 1.8 Amps, Totally Enclosed, Reversible Rotation, Ball Bearing The same can be done with the start run capacitor by looking at the tag for the MFD and voltage. Play. Sitting still it doesn't cool and the rad fan only seems to run when engine temp is calling for it. The outside fan is the condensing unit. Maintaining the condenser fan motor can help to prolong the life of the AC compressor. Fan Speed Controller. It is possible for the condenser fan motor to run on these models, even if the Sub-Zero is turned off at the thermostat. Here are the steps I take when I think I have an air conditioning contactor … Typically, this means one of two things: your outside AC hums but the fan doesn’t spin or the entire outside AC … The run capacitor helps correct the "power factor" of the motor. There should be no continuity to ground. However, some homeowners wonder if they should (or could) still run their blower fan when their AC isn’t in operation. When the thermostat is set to “ON”, the FAN will run at all times. Both radiator fans should always run when the coolant temperature sensor in … When the a/c is off the fan … When the AC clutch engages to run the compressor, it places an additional load on the engine. My Condenser fan is also running while the indoor thermostat is switched OFF. pushrod on . You have a heat pump. (Not Recommended) Setting the FAN to “ON” is not needed to run the AC or HEAT. It helps make the condenser fan motor more efficient. Should You Run Your Blower Fan without the Air Conditioner? Any Sub-Zero model listed in the table below has a condenser fan motor that runs continuously. Hi all, I live in CT, which is a chilly 26 degrees tonight. A 4 year old trane should last awhile. I don't know the correct terminology) turns on. ... How to Check Home AC Thermostats. Without the run capacitor in the circuit, the motor will still try to run and may spin slowly because it is now very inefficient - This is bad. July 05, 2015. If you have an emergency heat setting, then just the heat strip comes on with the blower. Day2 . If the AC doesn’t run or hum but you hear it clicking, the contactor probably needs to … either way, he needs to come back and fix that for free, unless you are just mistaken about direction of flow. In most cases, the ideal temperature is around 150 degrees Fahrenheit. But the car's computer (PCM) should bring the idle speed back up. If you lose over 200 rpm and idle speed doesn’t rise again, then there’s a problem. This is a big no no, and you could fail the compressor and other components. No insects or debris in contactor. When the ac is of the radiator hoses both become same heat after a while and the overflow reservoir starts boiling over and the fan do not kick in. If you are near the condenser unit and it feels hotter than usual, it indicates that the fan motor may be overheating. Don't see any bad wiring connection. The fan in your AC unit helps circulate air throughout your home. Is the A/C condenser fan supposed to run all the time? Therefore, to determine whether or not this part is working, you’ll have to walk outside and look at the fan through the vents of the condenser unit. For some reason the fan on my home ac unit will run for 10-15 minutes before the ac compressor (I'm assuming it's the compressor. However, this is not what your original post said- that the outside (condenser) fan runs continually, even when the thermostat is off. Fan speed controller or low ambient fan controller is a control that is used to control the fan speed of the air-cooled condenser in a heat pump direct expansion system. either he changed the fan with the wrong one or he installed it backwards. The house will warm up at least 5-7 degrees above the set temperature before the compressor turns on. It cost me Rs. Both radiator fan and condenser fan do not run on low or high speed with the A/C ON or when the engine coolant temperature is above 210°F (99°C) Check the No. Is the A/C condenser fan supposed to run all the time? Heat Pump AC Condenser Fan Motor Not Turning - Both heat pumps and air conditioners use the process of refrigeration to provide heating and cooling.One of the major components of that process is the condenser.A major component of the condenser is a condenser fan motor. The fan should not run with only one side powered. A fan blade is designed to run in one direction, otherwise it only moves about half of the air it should be. Refrigerator Condenser Fan Motor Troubleshooting. The air conditioner fan is located in the condenser unit, the portion outside your home. What is confusing to me is that in your last couple of posts you said that when the thermostat was off, both the air handler and condenser fans were off (as they should be). That coupled with the dynamics of a condenser unit design, the ambient air is going to balloon or mushroom inside the unit rather than go out through the coils effectively. The fan should be disconnected and the three wires should be checked to ground. You should be able to use a single switched or double pole switched contactor. The fan pulls air in through the condenser. Even in Florida, there are plenty of instances when you don’t need to run your air conditioner to keep your house cool. if the fans run in reverse, then it would be sucking where it should be blowing. How to Turn the Blower on Without Running the Furnace. After that I noticed strange behaviour of Radiator Fan. If it is fried or jammed with bugs and dirt, your AC won’t work. You can google heat pumps and learn how they work. The furnance in the garage is the blower and the outside unit is the fan and condensor. Sometimes power is supplied to both the compressor and the condenser fan motor by the same contactor. 4500/- + Labour Rs. I changed the low speed fan and high speed fan relays and get the same result. (Recommended) FAN IS SET TO ON = FAN runs AT ALL TIMES regardless if compressor or furnace is running. The AC condenser fan is designed to keep the condenser cool so that it can continue to efficiently convert the gas into liquid, and keep the AC system operating correctly. Check to see if the compressor is running and if it is and the condenser motor is not running it could be wired incorrectly, there could be a broken wire somewhere or the new motor is defective. Heat pump is used in temperate countries and can be used to operate in cooling or heating mode. It will run when you have it on heat or air. I replaced water pump and radiator and coolant temp sensor. 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