I have 2 A/C Units. The smaller has stopped working. When it is supposed to kick on you can hear it hum but the fan does not turn... you can turn it manually and it spins fine... I want to see if it is the capacitor... CAN I USE THE CAPACITOR FROM THE WORKING UNIT AND USE IT ON THE NON-WORKING UNIT??

Working Unit Capacitor = GE 67K7001
Non-Working Unit Capacitor = GE 69M6401

I doubt it,, but compare the numbers/microfareds written on label, if they are the same,, go for it

The answer would be no... it looks like on is a 5 microfared and one is a 10 microfared capacitor. This will not work for you.