Hello and nice day off! I had my old used Thermo Top C, Bj 2011, installed in my W124 (petrols) by a company. The heater has so far been used very little, in the previous car I was able to start the heating with a SIM card, so call. Now in the W124 is only a switch. The fans in the car do not run on, only if the car is completely cold. The workshop, no specialist for it, said from 60 degrees it shuts off. That is, I drüc ke the button and start the heater, it then runs (blow) until the water reaches 60 degrees and then switches off and not on again. So there is clearly something broken or wrong installed? Does anyone have an idea what it might be? Thank you and greeting Martin