the temp needle stays at 40% , and it gets there in max 5 mins of normal drive in moderate outside temp.
then it stays there no matter summer or winter, traffic drive or highway, ac or non AC.
rad fan turn on when needed n turns off afte like 40 or 50 sec max and it does not move temp needle at all.
but if there no thermostat valve, then needle will go up n down according to outside temp, car movement and rad fan operation which is not as intended