:huh: I start the car with AC on and drive around town or wherever and the H/C gauge will go all the way about 7/8ths high without touching the hot mark. Then it will fluctuate down to halfway to three-fourths. :huh: I don't hear any funny noises or anything like that. I have changed the radiator fluid before, head gaskets, heater core, and motor plugs and thermostat. There are no leaks or anything but water from condensation. I am thinking it's the Coolant Temperature Sensor, Thermostat or Water Pump. What do you guys/gals think?