Tercel thermostat 1993

Good afternoon,
I am new to this forum, I see it really, I wanted to ask you for your support since I have a 1993 Tercel which has the direct fan which makes the temperature always remain cold and when I want to use the hot air I can not since I do not reach the appropriate temperature.

I wanted to know if this makes the gas cosunmo greater since the engine does not reach the right temperature ???

Seeing the entry of water to the engine I see three tremosttos I would like to know which one that I must change to be able to make the fan work when it must and not that it is working 100

I really appreciate the help they can give me

I did not understand very well what you explain to me, but you can remove the thermostat and the temperature bulb is mounted on the vehicle radiator if it is the 93 engine, it is the carburee, if the bulb is only the bulb you should only change it is nothing of the other world, the bulb always carries two cables, if you want the radiator to check by its boats stop verifying if there is the bulb.