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Compressor hums and won't start - Craftsman 3 gal. Air Compressor, 1.5 hp, Horizontal k

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Husky air compressor motor hums won't start


In a safe manor, when the motor is humming, give one of the pulleys a push to help get the motor started. If the motor runs OK with the help push, the start capacitor is bad. If not the next thing to check is the tank check valve.

Nov 23, 2012 | Air Tools & Compressors

1 Answer

Motor hums but won't start


Hi,
Most problems with humming motors are with the power input TO the motor (Not enough power to turn the motor)
I'm guessing it is a single phase compressor? If you have it connected to an extension lead, then, if you can, try plugging it directly into the wall, (you can lose vital power through the long lead itself) Second the capacitor attached to the motor could be on its way out or shot. You would need to get it tested, or if you notice anything bulging out of it, then you know it needs replacing. If all the above are ok, then you would need to get the motor itself checked out by an electrician, the bushes or coils are probably gone

Hope that helps

Sep 10, 2012 | Air Tools & Compressors

1 Answer

Cambell Hausfeld model wl506201aj compressor Hums when switched on


This could be caused by one of two things:
- a stuck or broke tank check valve. This would be evident if the compressor starts up when there is no pressure in the tanks but only hums when the tank pressure is up. Some valves can be cleaned and will work for a while but they usually have to be replaced.
- motor start capacitor. If the capacitor is bad it won't get the motor spinning, with or without pressure in the tanks. You can test it by taking the shroud off the pump and carefully bumping the motor to get it turning. Be careful, it may run up to full speed right away. If it runs replace the capacitor, if not you may have a burnt or shorted motor.

Apr 11, 2012 | Campbell Hausfeld Air Compressor Check...

1 Answer

I have a CH 8 gal compressor that won't run. When you turn it on it just hums for a couple of seconds then stops. You hear a click and then your able to turn it on again but it still just hums


Remove the air out line and the motor. Try to turn the motor and the compressor by hand. You have a seized bearing somewhere. Bearings are available at any power transmission shop for a few dollars.

Feb 04, 2012 | Campbell Hausfeld Air Tools & Compressors

1 Answer

Motor hums but won't kick in


Hi simpsonruth1..
In the back of the compressor motor you will see a fan, remove the plastic cover to get to it..
Once you have the plastic cover removed and the fan exposed, plug the compressor in and spin the fan with your fingers...be quick as the fan could cut your fingers if you do not get them out of the way..
If the compressor starts working, then the start capacitor is bad on the compressor...if it does not run then you have motor troubles, either replace the motor or get it rewound.
Please take time to rate me

Sep 06, 2011 | Paasche 1/8 HP Diaphragm Compressor

1 Answer

My compressor is very hot and not running or kicking on, it was making a load humming noise yesterday and my freezor is not freezing?


It is cycling on overload and not starting. you can try a "hard start kit". If it still won't start then the unit must be replaced

Jun 24, 2011 | GE 18.0 Cu. Ft. Frost-Free Top-Mount...

1 Answer

Motor hums dont start


sears craftsman air compressor motor hums. replaced start capacitor still hums

Mar 13, 2010 | Clarke Power Products Inc AC2001 2HP 4...

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