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Fan is working, the unit outside is making a humming noide, but NOT working

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Sounds like the outside unit fan is not working. it can be two things: the fan motor or capicator. Hope this helps tim

Posted on Aug 26, 2010

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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

The fan outside is not working but it's not locked


What voltage is the unit it could be the capacitors for the fan motor is bad or a bad fan motor. my guess is the humming you are hearing is from the compressor. There should be two copper lines going to the unit feel the temperature with your hand and see if the bigger one is cold. If it is it means your compressor is making that humming sound. but i need more info. could be a number of things bad contactor.

Aug 13, 2011 | Heating & Cooling

1 Answer

My air conditioner has stop working its blowing air inside but the fan is not spinning outside .....


If the fan is not running is the compressor not running also...if neither is running the possible reasons are 1..no power to outside unit...2..bad contactor on outside unit.is this buzzing if it is this indicates no power...3 bad capacitor,do both compressor and fan humm then quit humming and hum some more...4 high pressure switch has shut unit down because fan wasnt running if compressor was running but not fan....if your unit has this there will be a manual reset button where the lines come out of unit...if compressor was running and fan was not...1 bad fan...2 bad capacitor.. if you do not have any electrical knowhow i would recommend calling a hvac tech to come and fix unit...Thanks

Feb 01, 2011 | Samsung AS18A6RB Air Conditioner

2 Answers

38CKC036 Air Conditioner: outside fan will not come on makes a humming noise...


If the humming is your compressor running (feel the large copper line going into the unit, it should feel cold aftter a few minutes of run time) then the fan motor or the capacitor or both need to be replaced, check for voltage to the fan motor when the unit is "humming" if it has voltage and will not start replace the fan motor and the capacitor. hope this helps.

May 18, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

I have a Ruud Heat Pump system. The outside unit makes a humming sound in either heat or cooling modes. The fan won't come on. In cooling mode, the compressor starts up, but them shuts off after about a...


Sounds like your condencer fan motor is stuck. Can you take a long rod and when the power is off to the outside unit, spin the fan blade? Maybe it will be enough to get it working again.

Apr 07, 2010 | Heating & Cooling

1 Answer

Carrier Compressor Issues?


When you shut it off and back on it slugged the compressor if you turn it off and back on before the pressures equalize between the high and low sides it will slug the compressor and it will not run should let sit for five minutes or so before restarting. The humming is either the compressor making noise usually common for the compressor to make some noise or the fan motor bearings are getting bad on the outside unit. If the unit works normal probably not much you can do till it breaks if it is the compressor it is more economical to replace the whole unit if it is just the fan motor it is worth changing. You could take an amp draw on the fan motor and the compressor to see if the are within the limits on the name plate of the outside unit.

Jan 25, 2010 | Heating & Cooling

2 Answers

My outside unit is not actually working. It is


Hey, there. So, you have a hum outside, is your fan motor running outside? Does the compressor run and stay on, it is louder than the fan motor. The two pipes coming from the unit, the small one should be warm, the big one should be cold. Let me know what you got

Jun 20, 2009 | Ruud Matching Split Air Conditioner

2 Answers

MY AIR CONDITION ONLY PUT OUT WARM AIR EVERYTHING SEEMS TO BE OK FILTER TURNS ON OK BUT THE OUTSIDE UNIT HUMS BUT DOES NOT FAN


Sounds like a bad start run capacitor. The exhaust fan motor may be bad too. Be careful, this unit delivers 220volts of electricity.

Jun 17, 2008 | Goodman Heating & Cooling

1 Answer

Outside unit not working


If the heating and cooling is working O.K. and maintaining the proper temperatures it is possible that your outside unit is in its off cycle. If the inside unit is running and the outside unit is not with an elevated temperature inside check the power supply to the outside unit. Most units have a disconnect located near them. Check the disconnect and make sure it is set to the on position. Listen for a hum noise at the outside unit which could indicate that the control power is being supplied to the contactor.

Jun 15, 2008 | Samsung AS18A6RB Air Conditioner

1 Answer

Fan not blowing


Even when the power is off at the unit outside the thermostat will supply power to the contactor of the outside unit. This may give a hum or buzz as you stated. If when the power is on to the outside unit the fan tries to start but only hums the motor may be bad. Does the compressor start and run?

May 06, 2008 | Weather King 10AJA2501AH Air Conditioner

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