Moin has already tried the SUFU but found nothing suitable. So, my convertible 9-3 bj. 2002/3 has problems with the radiator fan – it runs “a wolf” 😉 The car has automatic air conditioning and only a relay for the fan. After the engine control started the error showed itself: coolant temperature sensor defective. This changed. Error deleted (no Tech2) – error is no longer shown. Nevertheless, the cooling fan starts immediately after engine start and does not go out – independently of Klimautomatik an oder aus. Speaking of, the “unmotivated” running of the fan had the car already long before the sensor exchange. Actually no problem (the engine overheats so not so) but a bit annoying and yesterday there were problems with the AU because the car hardly came to operating temperature. Can it be that a fault erasure is not enough and the cooling fan circuit still needs to be calibrated and it needs a Tech2 for that? Or is there somewhere else a sensor that is to be changed? Thank you for tips