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Outside AC Unit Making Noise but the Fan is not working

Hi,
For some reason one my AC units (larger one) has stopped working. I turned it on and it was giving a buzzing noise but the fan was not working. Also, the warm air is coming out of the registers. Any ideas what is wrong?

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  • 227 Answers

It could be the capacitor on the fan motor has gone bad.

Posted on Jul 20, 2009

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1 Answer

Outside unit will only run for a short amount of time with A/C before the fan stops turning and starts humming, squealing/screeching and the top of the outside unit gets hot.


The bearings are bad in the motor and after the fan runs enough it eventually gets hot, making the bearing screech and the fan locks up. Need to replace motor again. See if it has a warranty. The reason it gets hot is because the fan is what removes the heat from the coil and if the fan isn't running there is nothing to cool it off so to speak.

Apr 19, 2016 | Heating & Cooling

1 Answer

My outside unit is making a loud weird noise but the inside unit is working completley fine it is 7yrs old now


the outside unit is where it all happens. That is where the compressor is and its cooling fan. The inside unit is just an evaporator, a bit like a car radiator and a fan. The inside unit is protected by the room, the outside unit is in the rain, snow and wind.

You need an AC engineer.

Feb 01, 2016 | Heating & Cooling

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I have a lennox ac unit model M/n hs 29-029-2p S/n 5802g 11144 the fan just stop working and the motor was making a noise like it was humming plus no cold air was coming through our house we purchased it...


The fan stopped working and the compressor overheated due to this. Turn the disconnect (switch by outside unit off) and let cool.
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Try spinning the fan by hand. If it moves freely replace the capacitor, if not replace the motor.



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Aug 21, 2011 | Heating & Cooling

1 Answer

Water is not draining out the back of the window unit and water is blowing out the front and fan is making a noise


Kathy, there are 2 reasons this happens.

1. the unit is not tilted down at least 1/4" on the outside of the window.

2. The drain hole in the condensation pan (under the unit) is clogged.

Resolving the above (either one or both) should solve the problem.

In the meantime turn the AC unit OFF.

Hope this helped you.

Jun 23, 2011 | Hampton Bay HBLG5004 Air Conditioner

1 Answer

I have A York Affinity 1800 AC/Heat Pump and a Honeywell Control.TH 8000 Series.My outside unit froze up and was making a noise. I read my Honeywell instructions and found out I should set the unit to...


The DEFROST cycle is not engaging out side.EMG(electric only) will heat untill the outside unit melts and is looked at.The noise is the fan blade hitting the ice.

Jan 10, 2011 | Honeywell Heating & Cooling

1 Answer

Turned on AC was running fine. 30 minutes later began to hear a strange noise. Opened AC/Furnance closet & heard a sound best described as air letting out of a tire. It seemed to be coming from...


Hi!!

This means that the condenser fan motor (outside unit) failed, this caused to build hi pressure and either activated a safety valve to release the extra pressure or blew a line and R22 Refrigerant escaped from system.

The fix is to replace motor fan and capacitor find the leak and refill system with R22 Refrigerant Gas. It is safe to turn on the Fan Only mode on the Thermostat until a HVAC Tech arrives.
To perform this job parts and labor included will cost: about $300 -.$400. Look on the Yellow Pages for a Tech in your neighborhood.

Good Luck!! Don't forget to Rate this post!!

Aug 13, 2010 | Goodman CKL42AR42 Air Conditioner

1 Answer

Fan not working on outside AC unit


The buzzing noise is probably the fan motor. Is the compressor running? First make sure that there are no tripped breakers. After that kill the power and check the capacitor with a multimeter. If that checks good then check the fan motor windings with the multimeter. Let me know if you have any questions.

May 26, 2010 | Intertherm P3RA-060K Air Conditioner

1 Answer

Our ac just suddenly stopped working. the fan inside the house is blowing out air, just not cool air. i checked the ac unit outside and the fan blades are not moving, but can hear something in there making...


probably from the symptoms you describe the condenser fan motor has failed.If the fan is not running and the copressor is you need to shut the power off to the unit until it is repaired, the compressor can susstain damage from the lack of fan, and it is the most expensive component in the system to replace...

Aug 15, 2009 | Heating & Cooling

2 Answers

AC fan not working


turn it off call repairman

Jul 11, 2009 | Heating & Cooling

4 Answers

Central ac blowing hot air outside fan not moving but making a noise


This is nothing but an either or -or ! First, make the thermostat calls for cool, there are suppose to be 2- noise outside, the fan motor and the compressor (and if a old system,a humming noise which is the contactor coil which picks up the main 240-volts).. hurry up and take a stick or something and turn the fan blades, if it picks up speed and run, then its the capicator. If not then the fan motor is bad.! (BOTTOM LINE)!

Jun 09, 2008 | Heating & Cooling

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