2015 Alhambra 2.0TDI Fan runs OK at start up but sometimes stops after a while. Suggestion is motor brushes worn out. There seems to be 2 types of fan fitted 1K2820015 control module mounted or 7E0819021A( dealer says this is my type) no control module fitted. Mine has the Climatronic aircon. I have a spare fan so will try it when the weather improves. Why the 2 different types of fan?