The factory fan kick in temperature of Pakistan assembled Khyber is 98c and kick out at 93c or something
The thermostat regulates minimum of 82c
If your fan is not switching on, most probably you have a sensor in place of a switch, they look similar but are not,
You can even make a suzuki mehran/fx item work here. But remember the mehran switch needs to be in radiator as its lower temperature, and is located in radiator for this reason.