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Originally Posted by aklim
If it is roaring when you start it, why would you say it wasn't functioning? I think it turns on when you first start the car, doesn't it?
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The electric fan is not roaring, it is the mechanical fan which usually just spins at relatively slow speed until the car gets hot enough for it to engage directly through the coupling clutch (I am not sure if this model uses a viscous mechanical or electric clutch).
Once it engages and you step on the accelerator pedal you hear that fan ROAR! If you don't notice it yours may not be working, which also may explain why you are seeing temps over 100°C on the gauge.
My electric fan has never gone on that I have seen or heard.