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Motor outside is humming like it on but the fan isn't turning

The motor on the outside runs for a little while then turns off but inside the house the air is hot

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  • FunnyPlumber
    FunnyPlumber May 11, 2010

    When you say motor on outside are you talking about the fan motor or the compressor?

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Sounds like the run capacitor is bad or the bearings or siezing up. Turn the power off to the unit, then spin the fan blade to see if it spins freely, if it does then it's probably the capacitor.

Posted on Aug 02, 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

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How do I fix my A/C


can be a bad fan motor, defective capacitor or contactor issue. capacitor is cheapest fix if bad.

May 11, 2014 | Bryant Heating & Cooling

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My American Standard Heritage 11 unit was not working properly when i came home from work and the temperture in the house according to the thermostat show the temperture in the house to be 85 degree&#


the dual run capacitor is bad located in main panel of unit size of small red bull can it will be swelled up on top indicating it bad get on at electric motor or electric supply house most ac stores wont sell it has a rating like 35/5 370

Aug 27, 2012 | Heating & Cooling

1 Answer

Fan wont turn


I have taken one apart. reassembled and the fan would not turn, although there was power to the motor and it wanted to turn.
Sorry this is long...only this is about taking the motor itself apart..and I have yet to find a replacement motor.

1. Tried a little WD 40...(only on iron motor Housing!) nothing.
2. Took apart inside of motor. some rust inside..
3. carefully rubbed clean with WD 40..
4. leaned off WD 40 with contact cleaner...
5. Then worked little bearing loose on back side.
-Kind of turned upon reassembly..
6. Found some silicone High temp lubricant and took motor inside part again.
7. a very thin coat of lubricant inside rotor.
-Re assembled yet again..began to turn at high speed, kept running..24 hrs..
- It .finally turned at silent mode. and continues to work
This may be ar beyond what you want to do, however if all else fails...what else can you do? buy another one?
Tips:
1. mark rotor holders with housing. (do not reverse.)
2. make sure you remove all lint, dust, etc inside.
3. the rotor bearing I had to work by hand again and again repeatedly syringing a little WD 40 at a time to until it turned easily.

Jun 04, 2012 | Oreck XL Professional Air Purifier

1 Answer

The outside unit has power going to it but isn't


maybe it has tripped off on high pressure, as you have have said the fan is not turning so will cause high pressure. now assuming the problem is the fan is not running than check the condition of the condensator /capacitor for the fan motor. if the motors winding is still good replace the capacitor and try it ON.

Aug 23, 2011 | Goodman CKL62AR61 Air Conditioner

1 Answer

The outside unit of a whole house air conditioner


replace start run capacitor of motor fan

Aug 17, 2009 | Heating & Cooling

1 Answer

My outside ac unit is humming and warm..but fan not turning!


Souns like the compressor is running but the cooing fan is not. First you should see if the fan is blocked . Then see If the fan motor is getting power. If the motor is getting power it could be that the motor is bad. If the motor needs a capacitor to start that could also be the problem. Look for a cylinder shaped protrusion on the side of the motor. If these all check out then whatever tells the fan motor to come on is not working. Sorry but I cant help with that. Good luck!!

Jul 05, 2009 | Heating & Cooling

2 Answers

Outside unit will not operate


Sounds like a bad fan motor. Inside fan runs, compressor runs. Outside fan. Are your contactors pulled in when thermostat set on cool? If not might be a contactor. If contactor not pulled in touch the top of it with the end of a screwdriver. If fan spins turn unit off a buy a contactor...

Tip: Always make sure power at disconnect is off

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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?

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