Engine fan constantly on

[H.Potter]

I have a W210 E220CDI 1999 model automatic, Display showing engine fan visit workshop and the engine fan runs constantly on full speed as soon as i turn the key. It is like a jet trying to take off in there. All fuses are ok . Is there a control unit for this fan? where is it located? what can be the possible causes of this ?

 

[miro]

I have a W210 E220CDI 1999 model automatic, Display showing engine fan visit workshop and the engine fan runs constantly on full speed as soon as i turn the key. It is like a jet trying to take off in there. All fuses are ok . Is there a control unit for this fan? where is it located? what can be the possible causes of this ?

It is a malfunction in the engine controller or temp sensor or perhaps its wiring.

 

[H.Potter]

Where is the temp sensor for the engine fan in my car?
engine control? you mean ECU?

 

[paulmadac]

Fan relay

There is an fan relay box under the driver s headlight that controls the speed of the fan.You will have to change that.