Volkswagen 2010 TDI 2.0 engine problem

Wonder why I have a problem with the engine to idle its on 1000 the fan is speeding on a full speed when even when the engine is cold I shut off the engine fan going to run for 15 minutes Volkswagen service cannot figure out for past five years was the problem if anybody knows please let me know

Видео Volkswagen 2010 TDI 2.0 engine problem канала Macher0520