Hello, I have several problems with my streetka. I slowly get closer to the solution. The cooling system was heavily rusted. I then always had a cooling water temperature of about 96 degrees. Fans always went up to 86 degrees then off etc. No overheating however I have rinsed everything, and still clean the cooling system. Rust is in the balance tank what I remove. Mix is now 50 50… Now the cooler front freer and the efficiency is higher because…. See below. uto now comes at 66 degrees coolant temperature. so the temperature does not rise any further only very slowly. So I wanted to replace the thermostat. But it is noticeable that the fan is running at the front. We have 0 degrees outside and the engine is at 66 degrees. What can that be? To mention is that the car also has an error message that the coolant temperature sensor should be defective. Too low values. What’s right because the car is running cold. Where is the fan being controlled at the front? can I do? P0116 reports the car. I would change the sensor and the thermostat, but somehow still has to be a problem with the cooler fan…… It’s a Duratec 1.6 8v engine, an air conditioner does not exist.