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newby cooling question

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I just bought a 2000 996 c4 and need some advice...

Today I warmed it up till it was at 180 degrees (at begining of "0" of the 180 degree mark) and then turned off the car.


Then I disconnected the engine temp sensor plug and turned on the ignition, voila the fan goes on but it turns off when I plug the sensor back in?

Now I read that the engine compartment fan is supposed to switch on when the engine compartment temperature is greater than 176 degrees.

The engine compartment fan does NOT turn on when temps are 176 degrees.


So is my engine blower fan ok, is it a relay, fuse, or maybe the temp sensor?

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No, steam coming out is not normal and your problem is not the engine bay fan. It could be the coolant cap not holding pressure. Should use the latest cap that ends with .04 p/n.

Also check if both of your coolant radiator fans are running at both low speed and high speed (at higher temp). Whenever the a/c is ON, both fans should be on low speed. You can put your hand on the ground about one foot in front of the front tires to feel the air flow.

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