Ac motor hums and wont turn unless assisted manually

If you are hearing humming from the motor itself, replace the capacitor. Should only cost you $10-20.

To rule out a faulty thermostat perform a jump test on the control board. There's a lot of videos and tutorials online for performing a jump test. I attached one of them for your reference, however with the humming, I am inclined to believe it is a faulty capacitor.

The humming sound is the motor trying to start, if you turn it by hand, usually they will run. it sounds like the motor for fan needs cleaning and oiling. God-Bless ya all!

The humming motor is that it could not get a turn direction because of only ac and a bad centrifugal or start capacitor if it hums try to turn it clockwise on the chuck to see if it will run .

slipping Belt

If you have to jiggle the wires going into the compressor motor to get it going, I would submit that you may very well have a broken wire or otherwise loose connection that is making contact when you jiggle the wires. If all appropriate connections were good, jiggling the wires would/should have no effect. I assume you are jiggling wires AT THE MOTOR input and not elsewhere in the circuitry. After you jiggle the wires and get it started, does it continue to run? or if not, describe more thoroughly what is happening..

i think the belt is slipping bad on your dryer,,
what puzzels me is you say you can here the motor hum? is it a hum? or a buzz?? if its a buzz then its more likley to be the motor as its past its best and it needs if it needs a new motor as well, it would work out cheeper to buy a new tumble dryer

Sounds like you have a dead zone in your motor...could be a replacement motor is called for. or continue to spin the drum by hand till the motor goes kaput...its cheaper

The motor bearings or drum bearings may be seized or the motor starter circuit is bad. Can you manually rotate the drum? If so, that probably eliminates any seized bearings. Try rotating the drum while the motor hums. If that allows the motor to run, then the starter circuit is defective. Unless the motor has an external start capacitor, the motor will likely have to be replaced.

The part you are talking about is called a capacitor. They come in various voltages and ratings. The best thing to do would be to find the rating tag on the motor, and look for the capacitor rating. There are many, many different sizes and types, so it is best to consult a proffesional before attempting to replace it on your own.

The condensor fan should be sucking air from the top and blowing it through the coils, probably a counter clockwise direction. The buzzing/humming sound is confusing to me. A humming sound sounds like a motor that can not turn over to start. A starting capacity would be needed. Just because you changed it out last year does not mean it is good. A buzzing sound sounds like a contactor problem. Contactors buzz and after a while, they will fail. In any case, you can "stick start" the condensor fan PROVIDED you are sure the ac compressor is working (this is for a short and temporary use). Also, you may have a high load duty capacitor that assists in the unit running. This will affect your condensor fan operation if it is not good. Unless you know all the components and operations of ac electrical, I would highly recommend calling out a professional.