Fan will not come on in cool but will in heat. Also fan will run when set to off and fan is in the auto position. A switch was replaced back in the winter. I am wondering where I can find a wiring diagram that will show me the switches wiring. There is two switches inside the cover on the inside unit. I think the switch may be wired wrong. I found a red wire in the floor under the unit but I do not know if it was left out or may have been replaced.