Heat Tempratue Problem

I Have A 98' Ford Taurus, It Stays At A Normal Spot On Temprature Guage, But I have Hot Heat, And Sometimes Warm Heat. Any Help, I Think The Thermostat But Not Sure. Or Maybe I Have A Partily Clogged Heater Core. I Was Told You Can Flush Them. Any Help On This Is Good, Taurus Is New Car To Me, Have Worked On Several Others. Thanx!

Try posting on the Taurus board. You may get more responses.
I don't understand what the problem is. Most people complain that they don't have any heat. You state you have heat and your car is not overheating. Sounds great.
To flush heater core, disconnect the heater hoses going to the heater core, using a garden hose flush the heater core.