Hello! I have the following problem: My Seat Arosa (BJ 99, MKB:ALL) is not getting really warm anymore. The temperature only rises up to approx. 70°, heating only warm. The thermostat and flange have already been changed twice (brand parts). The problem still exists! Does anyone have an idea what else it can be? If the water pump is defective, the measured temperature would have to be higher or not? Was also changed before 40,000 km with the timing belt. have had stasis? Thank you for your help!