>>28576068
>The thermostat regulates the engines minimum temperature.
With enough airflow (like when driving on the highway) you can sit near the said minimum but the temp will go up if there's less airflow (if you slow down). When the temperature is high enough, electric fan will turn on to provide more airflow and possibly reduce the temperature. If there's not enough load, it can reduce the temperature close to the thermostat fully open temperature if you force the fan to operate by, for example, turning the A/C on. Without the A/C the fan is set to operate with hysteresis but inside the range above the thermostat fully open temp. See the pic for the actual temperatures I have on hand.

>If both are "active" at the same time there is an issue with the components.
Idk what do you mean by "active" talking about the thermostat. It's either closed (small loop), semi-open (mixed, actively regulating, so probably this) or fully open (radiator loop), or stuck in any of those (not working properly). It's completely normal for the thermostat to be fully open, so the "normal" coolant temperature range is not limited to the "semi-open" thermostat temperature range, it extends into electric fans operating range. I'm not OP and I was replying to the post stating
>A functioning cooling system will see zero temp climb when coming to a stop.
which is incorrect.