MOTOR HUMS. BUT BLADE NOT SPINNING. - Krups 203-42 Electric Blades Grinder

The hum is a good indication that the fan is getting power. Therefor, the fan is locked up or it has a weak capacitor. Attempt to spin while power is off. It should spin freely. if not, you will need to replace the motor. If it spins freely, I would attempt to spin the fan blade while it is humming. If it starts running fine, it is very likely the capacitor. If not, then replace the motor.

Can you turn the motor shaft by hand?

try checking this article:
http://lightingworldbay.com/my-ceiling-fan-hums-but-blades-dont-spin/

Replace the capacitor inside the control panel on the outside unit. The top of the capacitor may be puffed up.
The fan motor may also be going bad. Change the capacitor first. It will have to be changed anyway if the motor is bad.

The motor is receiving power, and that is the humming noise.
The humming sound also says the motor is overheating and will burn out.

Turn saw off.
Use hand and manually rotate blade to see if it rolls free.

For example on my saw, the blade barely turned because a bearing was rusted.
I soaked the bearing in wd-40 and 3-in-one oil and salvaged it.
Look for oil ports on each end of motor, and on bearings.
Clean pulleys and belt that connect blade to motor.

If your blade rolls free, and the motor shaft moves freely, then the motor winding has gone bad, so replace motor.

Add a comment for more free help.
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For a price, expert speaks with you over phone while you work on table saw or any do-it-yourself project.
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I had the same problem, it was just humming, then after a few second the on board circuit breaker would cut out. After a little while I could hit the reset button and it would just hum again.

It turns out that the base of the disposal was jammed. There are 2 blades on the top that should spin freely, but the base plate that the blades are attached to also spins. In fact, that's what the motor drives. The two blades on top are not powered, they just flip back and forth as the base spins. So get a broom handle or a strong wooden spoon, stick it down in there, and try to pry the base plate free so it spins. That should do it.

The fan motor on the outside unit should be a sealed motor. If the unit is just humming is the humming from the compressor or from the motor being locked up. You could try spinning it a few times with the power off to see if this might get it to run and spray some penetrating oil under the fan blade right where the shaft comes out to the fan blade.

Hi, i,ve got exactly the same problem, did you manage to find a solution?

There is usually a pin in the shaft of the motor, that corrosponds with a slot in the fan blades, it sounds to me like either (a) the pin somehow came out, or (b) the slot in the blades is rounded. Hope this helps

The motor has gotten tired now after being on 24/7. With the blades off, it would turn easily but the weight of the blades strain the motor. You could check that there is proper 110 volt current to the motor because anything less will cause that problem too. You can also help the fan start by spinning the blades while it is on. Short of these suggestions, it is time for a new fan.