The fans would normally kick in when your engine gets to a certain temperature to help cooling, ie. when sat in traffic. If one of the sensors (cant think which off the top of my head, someone will be along shortly to tell you which one) is disconnected, the fans will run continuously, until the engine is switched off, or the sensor is replaced/connected.
Not really anything to worry about, but its one of those niggly things that is actually a pretty easy fix.
Not really anything to worry about, but its one of those niggly things that is actually a pretty easy fix.

![[Image: P1060836_zpsz3xgxt7q.jpg]](http://i1101.photobucket.com/albums/g427/wingnutz2/P1060836_zpsz3xgxt7q.jpg)