Cooing fans

2010 Escape 3.0 cooling fans come on at start up when engine is cold and seem to run constantly until key is turned off. No ac/defroster on,no over heating,no money light showing or codes being thrown by my scanner. I have read several causes this may entail but instead of just throwing parts at it and not resolving the problem I am asking if anyone here has had this problem and if so what the fix was for you. So, now that I'm totally winded from typing all this I'll set back and see what you all have to tell me.