Hello, I had a heater installed in my Hyundai Tucson EZ 06/20 (LU TT-Evo 5 Gasoline Basic). Now after ~10 times the heating does not start. The ventilation function works. In the workshop I was told that the battery is too small. I currently have 70 Ah and would need for min. 77 Ah. – Cost point 250€. Does anyone know the problem? The car and thus the battery are almost new and I also drove enough km to charge the battery.