2006 Dodge Charger

Heater problem
2006 Dodge Charger 6 cyl Two Wheel Drive Automatic 112000 miles

I have had heat until this morning. The rear defrost works, but only cold air comes out. I made sure everything was on hot, then I put it on defrost, then I tried the vents.
November 9, 2010.

Are you sure the coolant level isn't low? Does cold air come out the vents and the defroster? If so and the coolant is full, I need you to check something. Start the engine and let it warm up to normal operating temp. Turn the heater on hot / high. Feel both heater core hoses to see if they are hot. They should be. Let me know what you find.