1999 Ford Taurus XL review from North America

I have a 1999 Ford Tarus and I have this strange issue.

I have no heat in my car, which I have read from many people, but the one thing that I do not see, is that with my car, it overheats, but to the point where it goes to the over Hot line and then usually it will fluctuate and go down. But the strange part is it only overheats when the fan turns on to cool the engine???

I know this is strange. I have never seen a car do exactly the opposite of what it is suppose to do. I looked under the hood, and according to my book I am missing a 40 amp fuse to the blower, could that be this issue, I am almost scared to mess with the central nervous system of the car because of the way it is acting. Some say it might be the water pump, some say head gasket, but have not leakage anywhere on the car and no smoke coming out of the exhaust pipe. I am so confused. What else, other than getting rid of the thing, can it be that would cause it to mysteriously overheat but not blow a hose, and then the fan constantly run and not shut off but still overheat?

Please help with any advise.

Thank you.

My car is a good car, just some difficulties, would not recommend buying this make and model of this car because nobody seems to know how to fix them, or pinpoint the problems that seem to exist with the car.

The pickup on the car is terrible and I can just go on and on. But otherwise, she has been good to me for 2 years.