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When I turn the unit on the fan does not operate.

When I turn the unit on for fan only nothing happens but a humming noise. When I put it on cool I hear a sound like it is working however no cold air blows out of it.

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  • 92 Answers

Either the capacitor is not giving correct voltage and is inop,or the fan motor bearing are out and the motor is inop.

Posted on Jul 15, 2009

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Posted on Jan 02, 2017

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SOURCE: blowing hot air fan not turning outside making a humming noise

Replace the run capacitor. It is a silver cylindrical object located in the electical compartment of you outside unit. There is most likely three places on the top where different color wires are attached. One is marked F,or Fan. The center should be marked C, or Common, and the last should be marked Herm, with wiring to the compressor. Make sure you write down or label each wire you remove and it's correct location. They must be installed on the new part just like they were on the defective part. For you to know which dual run capacitor you need, the old one will have printed on the side either 370, or 440 v,as in volts. You must also need to know the microfarad rating and it is also printed on the side with the voltage rating. Since this is most likely a dual(runs fan and compressor) you should see two ratings abbreviated as mfd. Something like a 5mfd for the fan motor and perhaps a 35 mfd for the compressor. CAUTION !!! This device has line voltage and you must insure the power is off at the disconnect/ breaker BEFORE you begin the repair. Sounds complicated but really only takes a few minutes. The main thing is getting the right mfd and voltage ratings for the new part and keeping a record of where the wires were mounted on the old one, and putting them back the same place on the new part.

Posted on Jun 18, 2009

jeffbvegas1
  • 520 Answers

SOURCE: air on heat pump not cool outside unit humming but not kicking on

This could be an inoperative condenser fan.System will kick off on high pressure without proper air flow.The hum indicates voltage is present. Providing the fan motor is not locked up and will spin,Check your run capacitor which helps boost the motor voltage initially and will get it turning.If the cap is good,you may be faced with motor replacement....good luck

Posted on Aug 19, 2009

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2 Answers

Sub zero. 650 reefer. Significant hum coming from top mounted compressor, but still marginal cooling. Now a louder hum and unit no longer cooling.


Hi roger,

I see you concern, and if the unit does not cool anymore and there is a humming noise then you will need to replace or have your compressor repaired no doubt.

Have a nice day,

mvincentc

Jul 03, 2011 | Kitchen Ranges

1 Answer

Stopped cooling no humming or nothing digtal reading are working but nothing else


you need to replace the fan at the back of the unit. no noise means the fan is not working. The fan removes the heat from inside the unit to cool it. no fan, no cool. Your local appliance repair can fix it. the fan does not cost much and there isn't much labor involved. If you want to tackle it yourself then take your model number to the appliance store and order a fan, remove the back and replace the fan. Some fans are plug and play, some are not. if yours is not plug and play then you will have to splice wires. either way, the fan is your problem.

Nov 23, 2010 | Oster 12-Bottle Wine Cellar - Black

1 Answer

Unit runs for about 5 min the cuts off. whats the problem?


Hi!!
It could be many things, the most common are Low R22 refrigerant, bad fan motor, bad compressor. obstructed condenser coil, bad starting relay, bad capacitor. among other things.
To check fan motor, set unit to HI Fan Only setting and let it run for a while, check that fan did not loose speed and it is not getting too hot.
If fan is OK, then turn unit to HI Cool 60-65 degrees and see what happens. Hear if compressor kicked in or if just made a humming noise and stopped. if this happens, replace capacitor.
Keep me posted!! Rate this post!!

Aug 14, 2010 | Kenmore 72055 Air Conditioner

1 Answer

Condenser Fan and Compressor not turning on.


Are you sure you have high voltage going to the unit? One wire from fan lands on top left of contactor, the other two go to C and Fan on capacitor. Manually push in contactor, if no fan than no high voltage.

Jun 05, 2017 | Carrier 38CKC060 Air Conditioner

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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

1 Answer

My coleman mah 3 roof top will not blowon fan side


Sounds like you have either a bad fan motor or a bad fan motor capacitor. When you turn the unit on with the fan not working, the compressor (the humming noise) runs and gets real hot real quick resulting in the compressor cutting off ( the nothing after) on it's inside high temp switch. This is what the compressor is designed to do so that when this happens, it does not burn the compressor out. Replace you fan capacitor, give the compressor an hour to cool, then try it. In most cases and if I'm correct, the unit will run just like you want it to. Good luck.
Please rate solution

Sep 09, 2009 | Coleman Mach III Air Conditioner

1 Answer

Air conditioner comes on but nothing moves


Take the front cover off..
Inside you will see a barell fan..
Turn the unit on and give the fan a good spin by hand.. If it comes back on - the fan was stuck.. And is a sign of the fan motor on is way out - or maybe a bad capasitor.. If the fan does not come back on - the fan motor could be bad or maybe the capasitor..

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Aug 04, 2009 | GE AJCH10ACB Built-In Room Air Cool Unit

1 Answer

TV made humming noise for past few months and after it warmed up the humming would go away. It that same thing today and a pop noise came and the screen will not come on, and the tv shuts off and then...


i took off the back and pulled out the the fan. Then put in a fat screw between a slight gap whick kept the fan from hitting what ever is causing the noise. probably not safe but nothing bad happened yet.

Apr 17, 2009 | Samsung HLP4663W 46" Rear Projection HDTV

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

Jun 10, 2008 | Carrier 38CKC042 Air Conditioner

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