I happened to walk by one of my Goodman a/c units yesterday and noticed it was humming and hot, and the fan was not running.
I gave the fan a twirl with a stick and it started runniing.
My question is, do I need to oil the fan motor or replace the capacitor? or just replace the motor?
Probably the capacitor. If the compressor runs, but the fan doesn't start on it's own, most of the one's I've fixed before needed a cap. A visual check is to see if the top or bottom is 'bubbled out'...typical sign of a blown cap on those units. If you have access to a capacitor checker, you can check it.