Question about 2004 Chevrolet Impala
Most people think that the fans should be running all the time . This is not so. The fans turn on when the motor reaches a certain temperature this will cool the engine down then they will turn off then back on again as the motor heats up. M.ost vehicles will automatically actuate the fan motors when you turn on the a/c and keep them running while the a/c is on .This is normal. Try idling your vehicle for about thirty to fourty minutes and see if within that time your fans dont come on and turn of automatically without the a/c on.
Posted on Nov 29, 2009
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Posted on Jan 02, 2017
SOURCE: radiator fans won't turn on
Radiator fans only need to run when the engine temperature exceeds a predetermined range for the sensor. I would think the AC bypasses the sensor via a separate circuit. The engine temperature would raise if for example the ambient temperature increases on a hot day or if you were clinmbing hills about the mountains, or if the radiator water level was low etc.
Hope this helps somewhat.
Posted on Sep 14, 2008
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