Fans staying on after engine is off?

[Dalo Harkin]

erm, pretty sure they aren't working then  unless they are inaudible 

[Kus]

I'l take it to someone who knows what there doing have not got a clue where either of these sensors/buttons are..

[MaXXeH]

Fan control unit is under the battery tray.

The themo sensor is at the bottom of the rad your see a 3 pin connecter.

[Ant1981]

I've never understood why some cars have the fans stay on for a while.

What are they doing? Nothing, it's of no value. The engine is off, so the waterpump is off, so no cooler water is reaching the engine, all that is being cooled is the radiator, which without water being pumped is of no value.

[MaXXeH]

It is just where the water is still hot.  The thermo switch makes a circuit that keeps the fan running. Until the water cools below the set valve of the switch it won’t break the circuit.