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Ac unit my ac unit stoped working. all i can hear is noise coming out from it.

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It seems the fan has stopped. Either the fan motor is bad or it isn't getting any electricity.

Posted on Jul 25, 2008

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Posted on Jan 02, 2017

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window unit ac !! not a fridge . the hum you hear is the ac compressor trying to come on , but due to loss of gas charge it shuts right off again , this will require a professional ac repairman to fix this , 1st he needs to find leak then repair leak then add back lost gas charge , watch cost of all these services vs cost of entire new unit , it could get expensive

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Multiple clicking sounds coming from AC unit before AC unit turns on or before furnace turns on.


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My outside Kelvinator central ac unit will not turn on. I hear a faint humming noise coming from it so it appears that it is getting power but won't turn on. My fan in the house will turn on and...


Its possible that the contactor that closes to start the outdoor unit is not pulling in and passing power. You are hearing the coil humming since it is getting control power. Also first check that breaker for outdoor unit is not tripped

Jun 22, 2011 | Heating & Cooling

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My unit outside is working fine but it is making a lot of noise. All my neighbors are telling me that this is not normal. What can I do to reduce the noise. It is spinning fine but it makes loud noise.


Is the condenser coils clean..... If not take a hose and wash the condenser coils But make sure you shut the Main power off to it. Has the unit been charged with Freon lately??? If so they may have gotten it overcharged which will cause High head pressure and make the compressor noisy..... Or is it out of level and not setting on a stable surface. causing a vibration noise. You can put rubber pads under the AC if it is a vibration noise...... Also the Compressor may be going out..... It is hard to tell with out hearing it first hand....Hope this helps If you can't get it to quite down I would setup a Service Call to have them Service the AC and that you are having a loud noise coming from the unit....

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I HEAR A LOUD WHINNING NOISE FROM UNDER THE HOOD


Yes there is a bearing in the AC clutch assembly, and the bearing can be changed with out swapping out for a whole new AC compressor unit or even taking the unit out. 
The other thing to you may want to check is the Serpentine belt tensioner. The tensioner then to break apart and or when the clutch activate put's more pressure on the system and the idler pully bearing could alsy be the problem. 
Spray some water on the fan belt whale the engine is running and see if the noise goes away and comes back as the water dry's. If the noise goes away then it's just a worn belt and need to be changed or you may want to do the quick fix and buy Fan belt dressing. 
Good luck and hope this helps

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Squeeling noise coming from AC, compressor is on, fan not turning


The squealing noise is coming from the compressor. This noise is common when the unit reaches extreamly high pressures. The pressure is most likely high because the fan is not running. Since you can spin the motor it could be that the motor has damaged windings. Leave the unit off until the repairs are made to ensure no further damage to the compressor. You will need a multi meter and some experience reading wiring diagrams to properly diagnose the system. You can perform an amp draw on the motor to see if it is in spec. You can measure the volts to the motor and see if they are in spec. Finally the contactor can be measured with the proper meter to see if it is working properly.

My suggestion is to have the Motor and capacitor both replaced. Also inspect the wiring in the condenser electrical compartment for any signs of damage or burning.

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