Fan Opening Problem

After stopping the car, the car is constantly turning on the fan even without overheating and the car does not give any warning. Is it a thermostat? Vehicle Astra

Check the fan sender, brother. I say check fan resistance. Of course, you should connect the PC and look for the malfunction code.

I had it connected to the machine 3 days ago, spark plugs changed, there was no problem, but we had to reconnect.

I said before I reach 90, but I am correcting. I am fixing 2km. When I go, it reaches 90. When I stop it, it usually turns on the fan. Sometimes it does not open.