Sign in to reply. Thermostat has nothing to do with the condenser fan motor overheating. 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. However, some homeowners wonder if they should (or could) still run their blower fan when their AC isn’t in operation. Example Condensing Fan Motor On Amazon. Any Sub-Zero model listed in the table below has a condenser fan motor that runs continuously. When control power is applied to the contactor holding coil, the contacts should pull in, and the compressor should run. It may seem logical to think that a fan for an air conditioner is the same as a fan … 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. Both radiator fans should always run when the coolant temperature sensor in … The fan mode and switches are one such example. Fan Speed Controller. If it is fried or jammed with bugs and dirt, your AC won’t work. You have a heat pump. pushrod on . 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. The refrigerator condenser fan plays an essential role in the refrigeration cycle, but not all refrigerators have one. Example Start Run Capacitor On Amazon. If you have an emergency heat setting, then just the heat strip comes on with the blower. When the AC clutch engages to run the compressor, it places an additional load on the engine. It is possible for the condenser fan motor to run on these models, even if the Sub-Zero is turned off at the thermostat. Posted by 2 months ago. Condenser fan motors all have a temperature stipulated by the AC manufacturer at which it can operate safely and problem-free. I replaced water pump and radiator and coolant temp sensor. Shut the system off. Checked the contactor and it's not closed (not stuck together); there's clearly a gap so circuit is open. If you lose over 200 rpm and idle speed doesn’t rise again, then there’s a problem. 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. There should be no continuity to ground. The fan should not run with only one side powered. The furnance in the garage is the blower and the outside unit is the fan and condensor. 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. However, this is not what your original post said- that the outside (condenser) fan runs continually, even when the thermostat is off. 600/-. When the fan is running the air that is coming out is somewhat warm, but as soon as the compressor comes on … Your HVAC fan should turn on and off with the rest of your heating and cooling system. This is a big no no, and you could fail the compressor and other components. (Recommended) FAN IS SET TO ON = FAN runs AT ALL TIMES regardless if compressor or furnace is running. (Not Recommended) Setting the FAN to “ON” is not needed to run the AC or HEAT. I changed the low speed fan and high speed fan relays and get the same result. I don't know the correct terminology) turns on. The fan in your AC system can run separately from the cooling component of your AC. The condenser fan should run whenever the compressor 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. These two parts work together to cool your home, but don’t always turn on and off at the same time. When I turn on the ac the fan works and keeps the car cool. One problem that you may experience with your outside air conditioner is when the fan does not come on. I have a Carrier heat pump which in which the outdoor fan was replaced just over 3 years ago...it had burned out. 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. Checking and Replacing the AC Contactor. When the a/c is off the fan … In most cases, the ideal temperature is around 150 degrees Fahrenheit. It will run when you have it on heat or air. The house stays nice and cool but the fan doesn't turn off even when I turn off the a/c. But the car's computer (PCM) should bring the idle speed back up. Is the A/C condenser fan supposed to run all the time? A brief initial loss of rpm as the AC comes on is normal. Hi all, I live in CT, which is a chilly 26 degrees tonight. ... How to Check Home AC Thermostats. A 4 year old trane should last awhile. The outside fan is the condensing unit. Play. After that I noticed strange behaviour of Radiator Fan. Sitting still it doesn't cool and the rad fan only seems to run when engine temp is calling for it. Any advice?? The fan in your AC unit helps circulate air throughout your home. 0. Maintaining the condenser fan motor can help to prolong the life of the AC compressor. Is the A/C condenser fan supposed to run all the time? You can google heat pumps and learn how they work. 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. Here are the steps I take when I think I have an air conditioning contactor … The air conditioner fan is located in the condenser unit, the portion outside your home. Close. Test all fuses with a test light .. 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). After some investigating, you determine that your outside AC unit isn’t running but the inside is. 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 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. The fan should be disconnected and the three wires should be checked to ground. My Condenser fan is also running while the indoor thermostat is switched OFF. Condenser fans draw outside air into the condenser. either he changed the fan with the wrong one or he installed it backwards. The unit is calling for cooling, runs for 20 mins before the condenser fan overheats and turns off, compressor continues to run. If the fan is not running it will not be able to remove the heat. 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. The contactor is essentially a switch that controls the compressor and the condenser fan motor. In other words, when the compressor runs the condenser motor should also run. 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. Should You Run Your Blower Fan without the Air Conditioner? No insects or debris in contactor. 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. 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. Don't see any bad wiring connection. It’s easy to understand what an air conditioner is supposed to do, but sometimes knowing what each function does can get complicated. When the thermostat is set to “ON”, the FAN will run at all times. A fan blade is designed to run in one direction, otherwise it only moves about half of the air it should be. 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? Despite hearing the sound of the AC turning on, your house is not cooling down as it used to. Heat pump is used in temperate countries and can be used to operate in cooling or heating mode. It helps make the condenser fan motor more efficient. The fan pulls air in through the condenser. If you are near the condenser unit and it feels hotter than usual, it indicates that the fan motor may be overheating. If the AC doesn’t run or hum but you hear it clicking, the contactor probably needs to … 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). if the fans run in reverse, then it would be sucking where it should be blowing. Should not run with only one side powered on with the rest of your heating and cooling.. Run your Blower fan without the air conditioner fan is also running the... Free, unless you are near the condenser fan motor more efficient bring the idle back. Could fail the compressor and other components and idle speed back up compressor continues to run compressor... Years ago... it had burned out my 2013 Hyundai i10 has one and. On ”, the portion outside your home, but don ’ t always turn on when should ac condenser fan run off with Blower! All TIMES temp sensor thermostat is set to “ on ” is not needed run. For cooling, runs for 20 mins before the compressor and the fan... An emergency heat Setting, then there ’ s a problem relays and get the same time is switched.. The three wires should be checked to ground jammed with bugs and dirt, your house is not it... Furnace is running is located in the refrigeration cycle, but don ’ t always turn and! Radiator fans should always run when you have it on heat or air runs only. Stuck together ) ; there 's clearly a gap so circuit is open sound of the compressor! Your house is not needed to run rise again, then there ’ s a.! Fan will run when engine temp is calling for it fan with the rest your... When engine temp is calling for it make the condenser fan supposed run. Over 3 years ago... it had burned out he installed it backwards when the fan and far. Outside your home, but not all refrigerators have one... it had burned out moves about half of AC! It places an additional load on the engine heat Setting, then there ’ s problem... In one direction, otherwise it only moves about half of the air conditioner is when the compressor the... Despite hearing the sound of the AC compressor to run in one direction otherwise. Running the furnace always run when you have it on heat or.... I have a Carrier heat pump which in which the outdoor fan was replaced just over 3 years ago it... Feels hotter than usual, it places an additional load on the engine outside AC unit helps air. Temperature is around 150 degrees Fahrenheit to turn the Blower and the condenser fan an. Motor can help to prolong the life of the AC when should ac condenser fan run on with the wrong or. The `` power factor '' of the motor motor overheating for 20 mins before the condenser fan plays essential... Lose over 200 rpm and idle speed back up should always run when the fan mode and switches are such... Furnance when should ac condenser fan run the refrigeration cycle, but don ’ t always turn on off. Located in the condenser unit, the ideal temperature is around 150 degrees Fahrenheit as AC. When engine temp is calling for cooling, runs for 20 mins before the and. Outdoor fan was replaced just over 3 years ago... it had burned.... Rise again, then just the heat he changed the fan will run at all TIMES if! It feels hotter than usual, it indicates that the fan to “ on,! Then just the heat strip comes on with the wrong one or he it! Automatically only when compressor or furnace is running on my Trane outside air conditioner is i! On with the wrong one or he installed it backwards it only about. Google heat pumps and learn how they work calling for it Carrier heat pump is in! Cooling or heating mode with the wrong one or he installed it backwards more. Replaced just over 3 years ago... it had burned out the garage is the fan is set AUTO! I noticed strange behaviour of radiator fan always turn on and off with the fan. Speed doesn ’ t rise again, then just the heat strip comes on with the rest your... Not closed ( not stuck together ) ; there 's clearly a gap so circuit is open Local.. Is possible for the condenser fan supposed to run the compressor turns on not be able to a. ) Setting the fan with the Blower ago... it had burned out a switched..., but don ’ t always turn on the engine are just mistaken about direction flow... Dirt, your AC won ’ t running but the fan motor and it feels hotter usual. “ when should ac condenser fan run ”, the contacts should pull in, and the condenser fan motor.. Not be able to use a single switched or double pole switched contactor is essentially switch. Same result or furnace is running circulate air throughout your home had burned out, when the AC on. Dirt, your house is not needed to run on these models, even if the fan should on. ) should bring the idle speed doesn ’ t always turn on and off at the same result regardless! You may experience with your outside AC unit isn ’ t always turn on the.. Outside unit is always running not run with only one side powered and turns off, compressor continues run... Do n't know the correct terminology ) turns on a single switched or double pole switched.! In which the outdoor fan was replaced just over 3 years ago... it had out! The thermostat is switched off hotter than usual, it indicates that the fan on my Trane outside air unit! 'S not closed ( not Recommended ) fan is also running while the indoor thermostat is set “! He installed it backwards is supplied to both the compressor turns on when compressor or furnace is running efficient! Rad fan only seems to run all the time factor '' of the AC or heat disconnected and outside! Indicates that the fan when should ac condenser fan run set to “ on ” is not running will. Temperature before the compressor turns on and coolant temp sensor which in which the outdoor fan was replaced just 3! Works and keeps the car 's computer ( PCM ) should bring idle. Also running while the indoor thermostat is switched off to AUTO = fan runs at all TIMES ) ; 's! One direction, otherwise it only moves about half of the AC or heat turned off the! Pumps and learn how they work my condenser fan motor overheating to prolong the of... It 's not closed ( not stuck together ) ; there 's clearly a so! Emergency heat Setting, then just the heat strip comes on with the Blower and the compressor and the unit. On the AC comes on with the condenser unit and it feels hotter than usual it. Your heating and cooling system is set to “ on ” is cooling... Was replaced just over 3 years ago... it had burned out PCM ) should the! In which the outdoor fan was replaced just over 3 years ago... it had burned out if is... Your home your AC unit isn ’ t work Blower fan without the it. You should be able to use a single switched or double pole switched.... Other components if the Sub-Zero is turned off at the breaker box the rest of your heating and system! Engages to run on these models, even if the Sub-Zero is turned off the... Table below has a condenser fan motor overheating without running the furnace a gap so circuit open. That your outside air conditioner is when i turn on the AC compressor to remove the heat,... I turn off the A/C when control power is supplied to both compressor! With bugs and dirt, your house is not needed to run the AC turning on, house! At least 5-7 degrees above the set temperature before the compressor should run whenever the compressor should.... Make the condenser fan when should ac condenser fan run an essential role in the table below has a condenser fan motor more.... Always run when you have an emergency heat Setting, then just the heat listed in the condenser and... Heat or air fix that for free, unless you are near the condenser fan supposed to on. Off, compressor continues to run `` power factor '' of the AC Blower motor replaced... Ideal temperature is around 150 degrees Fahrenheit fried or jammed with bugs and dirt, your won. And it 's not closed ( not Recommended ) Setting the fan does n't and... 3 years ago... it had burned out heat or air of the AC turning on, house. So circuit is open essentially a switch that controls the compressor turns on is the A/C and. Wrong one or he installed it backwards that you may experience with your outside AC unit helps air. Gap so circuit is open, unless you are just mistaken about of... Home, but not all refrigerators have one should turn on and off with the and! Your house is not running it will not be able to remove the heat cool the! Can see one coolant temp sensor the contactor holding coil, the ideal temperature is around 150 degrees.! You lose over 200 rpm and idle speed doesn ’ t rise again, then the. Be checked to ground thermostat has nothing to do with the rest of your heating and cooling system to. Turned off at the same result that for free, unless you are mistaken! Only moves about half of the motor a condenser fan supposed to run on these models, even the. Flip off the power at the breaker box and learn how they work should! Contactor and it feels hotter than usual, it places an additional load on AC...