Question Details

As soon as I start the car the fan comes up even when the car is cold, the temperature gauge is normal, the coolant level is where is supposed  to be. The car is running perfect, but the only thing is that the fan stays running on high while the car is on.


Thank you in advance 

Ill be waiting for you response.


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MercedesMedic  2 months 3 weeks ago

This is an indication that the cooling system has detect a problem. To prevent the vehilce from overheating it runs the cooling fan on full speed. The problem can be caused by various issues. If your check engine light is on, start with that. It may have a code that can point you in the right direction. If the check engien light is not on, get a scanner or go to a mechanic that can do a full system scan. There will be a code that points you in the right direction.

These cars are hard to diagose without the right tools. But if you do have them, they become very easy to diagnose in my opinion.

Let us know how it goes.

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