The fan on my outdoor compresser unit has stopped working the motor is humming and the fan doesn't turn if you manually push the fan blades around the fan will spin but at a very slow speed. The unit was working fine earlier in the day. Is the capicator badmotor or both?

You could probably have a bad capicator. Try spinning the fsn blade with your hand .if it work then you have a bad capicator.
BE VERY CAREFUL BECAUSE THE BLADE JUST A LITTLE PUSH THEN IT WILL RUN NORMAL SPEED

Maybe you have dimmer for light also dimming fan motor?

there is a dual cap in unit. kill the power and remove the silver cylinder. on top it has 3 places it can put wires. F, H, C. write the colors of wires and where they belong. take part up to granger and buy. 30 bucks most. replace. if same problem do the same with fan motor, around 60.

You should first be sure your filters are clean and that your ductwork is clear.

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Outdoor condensing fan motor has stopped running. This problem could be caused by a bad motor run capacitor. If your motor capacitor is not the problem, then more than likely you need a new motor. Is the fan blade tight, stiff or hard to turn? If the fan blade is hard to turn then you probably need a new motor

Is the indoor fan working? The problem with the outdoor fan sounds like it could be your capacitor. Turn off the power to the outdoor unit and make sure the fan turns freely using a screwdriver or something that will reach the blades. If it turns freely then it is probably the capacitor. Let me know what you find.

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.

FOR QUESTION 1: They do run independantly. What will happen when your compressor is running but your outdoor fan does not, the pressures in the system will go really high and compressor will overload. That outdoor fan is used to disipate all the heat that is transferred from the inside to the outdoor unit.
FOR QUESTION 2: If you hear humming it can be 2 things. FIrst one is that that capacitor went bad. Dependiing if its a dual run capacitor(which helps both compressor and fan motor) or they both have individual capacitors. The second would be a bad fan motor. OPen your service panel outside to the AC. Find your capacitor for you fan motor. if there are 2 , locate the one that goes to your fan motor. Check it out(if its blown physically youll will notice it like really bubbled, like swollen) then change itout. Or you will have a dual run capacitor that runs both compressor and fan motor. It will have the terminals marked (Fan, Common, Herm) Bsically check your capacitor mfd(micro fared rating, it will say on the capacitor what its rated) Get a multi meter and put in the "MFD' selection. Before you check any capacitor you have to discharge the the voltage charge it has. Use an insulated handle screwdriver and just place the metel part across the capacitor leads. Basicall short them out. Then proceed with checks...hope this helps( remember to always pull the disconnect out from the box outside to cut power)

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

There's a rubber circle that is the damper between the blades and the motor shaft that rotates. The circle has spokes connecting the outer ring, which the blades screw into, to the inner ring which attaches to the shaft and holds it. If the spokes break you get the symptoms you describe, motor hums but no rotation, but blades can turn manually if you hand turn them them. If this is the case you need to remove and replace the blade mounting ring/damper. (About 25 bucks online)