Om651 RadiatorFan running FULLspeed

[FLASH8ACK]

Hey all!

I have a E250CDI (212.082) Blue Efficiency 4Matic 2013 that all of a sudden started running the radiator fan on Full. This happens everytime but only when the engine is running.

Fuse 22 in front SAM is OK.
Xentry NO codes
Xentry Pressure ACC is within Green parameters
Xentry it is possible to Control the fan speed manually 0 - 90%
As the fan i running high it is affecting the consumption as well

I have read all the "fan on full" threads on multiple Mercedes forums and nothing is matching up to my problem, If anyone can point me in a direction where to look i would be forever grateful.

 

[MinionBob]

Are these viscous coupling fans? If so it might be possible that the temperature sensing strip on the fan has failing causing the fan to think it is always hot and hence always running?