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Should the thermatic fan run constantly in a 2005 Mitsubishi Lancer?

Could you advise me if a thermo fan should be running constantly when the engine is on? Or should the fan switch on or off as required? My car is a '05 Lancer.

A thermatic fan is designed to run only when it’s needed. As the name suggests, it should switch on when the engine attains a pre-set temperature and then turn off below that temperature. It’s a way of having the engine run at a more constant temperature as well as saving the power normally used to run a fan that isn’t needed the whole time. Sometimes, a second electric fan will cut in when you turn the air-conditioning on, but the short answer is no, a thematic fan should not run all the time.

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