1997 Ford Taurus heating problem, what might the problem be?

I have a 1997 Ford Taurus, and my heat does not work. The air conditioning works fine. The air blows out of the vents fine. I replaced the thermostat already. What could the problem be? Thanks for your help!!!

Tagged with: 1997 ford taurus • air conditioning • ford • ford taurus • thanks for your help • thermostat

Filed under: Ford Taurus 1996-1999