On my escort zx2 the thermastate gage is halfway before car is on and while driving it goes to the red. and now when i also use the heater or just the fan it is makinf a loud clicking noise.

I think thermostat gauge being halfway up when cold is due to an erroneous gauge. The heater being on and the fan making a loud clicking noise could be an obstruction that has gotten into the fan area, like a leaf or stem from a tree. Or else, the fan is in need of replacement.

Gauge is nothing to do with teh fan ,the gauge is mismatched resistances ,but the fan motor is a different ball game