Moin, we have an F2000E 26.364 DFC Bj 11/99 Now the heating does not get warm in winter.. At the heating control valve under the front flap the coil was really defective. We renewed it. Thought that the thing was scratched. But no! Let’s set the rotary switch up in the cabin to MANUELL and temperature, then it doesn’t get really warm. In the middle only cold air comes out. The dashboard we removed in the middle. The heat exchanger is warm in position HEISS and cal t in position KALT, because the circuit to the WT on the heating control valve is locked off. This works. All flaps and Bowden trains work mechanically. Also the stepper motor for the middle nozzle works, but it does not separate very close to the fans. What else can we check? What is this sensor behind the hole lattice between the two DIN shafts of radio and toll? Is this the temperature sensor for the car mode? How does it work? Why does it also have a Little fan? Hopefully a MAN speci…