The heater in your 96 Taurus takes a while to heat up and then doesn't blow very hot On really cold days If you turn the fan to high speed the air gets cooler with time like the heater can't keep up w?

First thing to check is the coolant level. It can be low and keep the heater from getting warn and still not make the car overheat. If it's full, too cold a thermostat. Worst case is a partially clogged heater core. A collapsed heater hose possible.