Hello together, drive for 1 1/2 weeks a Fiesta, EZ 3/99, 75 Ps, 1.25 L Zetec engine. Very well maintained car, the bigger my shock, that the car already after a short drive (approx. 5 min.) always gets so warm that the temperature indicator goes into the red area. If I turn on the heater, I can just bring it back to the normal area again. The fan goes on, however, only the speed or the engine gets restless when I am shortly before the standstill. 500 rpm and then up again to 900 – 1000 rpm. I most likely tap on the thermostat, but I’m quite an autolaie. What do you mean? If the experts also think that it’s the thermostat, where does it sit if I want to replace it?? The “great” operating instructions say nothing about it.