fan keeps running after ignition turned of and this runs battery down on my 2011 kia sorento why

How good is your battery? Some cars run the engine cooling fan until the engine cools below a certain temp. If this isn't one of those cars look in the underhood fuse block and pull the relay it could be stuck, swap it with another in the same fuse block just match numbers

My 2011 did tje same thing. The mechanic showed me . Turn the keys completely back and then push in on tje keys. Yr keys will come out and everything will be turned off

Had same problem on my 2011 Kia Sorento. it is the relay for the fans that is sticking. It keeps fans powered on after car turned off to cool engine. But when relay sticky it leaves fans powered on until battery is completely drained.You can confirm by tapping top of relay under the elect fuse panel in engine area to see if the relay releases.