i have question. What if my new electric fan fails during hot day in city ? You cant notice that becuase its relatively quiet. And i dont want to see temp needle in red light.
So there is no warning before you end up in smoke and exploded cooling system.
Mechanical fan is making some drag onto belts and other things but its more reliable beucase it fails rarely and if it fails, you can hear it that fan is not making truck noise. And most of the time when mech fan fail, its always engaged
= its cooling your radiator even when its broken.