check your air conditioner condenser under the cab. If it plugs up you will get no air flow. A common problem. You have to unbolt the cover to get at it and then you can drop it down a little to blow out or wash.
correct, also some of these models leaked at seams and are in need of silicone, also run a jumper wire to the fan and see if it picks up speed, if so you are in need of a new switch . This is covered in post below. Also chech the blower fans and make sure they are not coated over.
Original owner said they never touched the fan and it quit working at the end of last harvest. Will have to check condenser under the cab as suggested by turbo