Question about 1997 Mercedes-Benz E-Class

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Cooling fan don't work even if the temperature raise, what should I check?

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First if it is electric fan or Viscous Fan. If the electric, check if fuses are ok, connections fine, and if the motor works. If it is the Viscous Fan, there is not much you can do unless you want it to work permanently. Normally the fan will be moving slowly once the engine starts, than when the inner thermostat gets its temperature it kicks in a fan clutch and than the rotor starts spinning as fast as the engine, it is less effective than electric fans as it will only give you the rpm speed of the engine from 1000rpm to 5000rpm where the electric motors give up to 8000rpm.On the Viscous Fan check if it kicks in if not replace it or get someone who knows what he is doing to permanently lock it so it will turn even when engine is cold. Not recommended in normal climate.

Posted on Jun 02, 2010

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