Combines 8680 air cond fan HElPIJ

as I sat here scratching my head about your problem, it just came to me that there is mystery filter under the cab that not everybody knows about. To tell you the truth I forgot about till now-- I think I'll check it tomorrow. Hopefully that helps with some of your woes. Good luck with the harvest

Still cant get much air into the cab cleaned filters and fan turning normal where is the evaporator or heater core on these machines

Better check your book or call your dealer for a little help on that one