Honda Car Forum

I am trying to find out what could have been wrong with my car? The
temp would sometimes rise(only when car stopped at idle) to almost the
hot line before the fans kicked in. Then it would take the car for ever
to cool down if it could because the engine was hot. Im trying to
determine if the thermostat would stick and not allow enough water to
the motor causing the engine to get hot would the fans know to kick on?
What I mean is where is the point where the radiator fans get the ok to
turn on.? Is there a sensor or relays for the fans? Thanks!!