Is the contact where the power goes from the unit to the power box or is a contact inside the uunit central outside with fan it started this after my grass was mowed fan will not quit running when on it startes running as soon as I plug it in to the power box.when it is on the air inside cools,but with the inside on and fan off it feezes

http://www.chinacontactor.net/Products/Contactor/MBC-2X-AC-Contactor.jpg

Inside the ac unit. Follow the power wire.