I drive an 05 Lancer Ralliart and the fan fluctuates between on and off. It started back in late December. The radiator has coolant, the thermostat doesn't show overheating. Can't figure it out, any ideas out there?

 

search for fan controller and you find this: https://www.evolutionm.net/forums/5008668-post14.html

Yours needs replaced.

 

Please try searching before you post up something that has been discussed over 30 times...