2007 lancer cedia - radiator fan

john.s, Feb 6, 4:19pm
I had noticed over the past year the fan is staying on longer - even on cold days. Then last week, the fan starts as soon as the engine turns on, and runs for a few seconds after it's turned off.The fan runs 80% of the time now when driving.
No overheating problems, plenty of water in radiator, aircon turned off.

any ideas!