On mine the fan runs 24-7 but the cooling unit dosent kick in until there is a temp swing. I also have mine on its highest setting and it stays between 62 and 64 degrees. Its been a very humid this summer here in PA and my Edgestar creped up to 70% rh because I am in it sevral times a day. So I put in a can of damp rid for a few days and now I am right back at 65%