I have a 2004 Pacifica that I have had trouble with the heating system. It began with the air just coming out on the floor only. I tore the dash apart to see if I could find the problem then I found this web site and disconnected the battery terminals. This fixed this that problem but a new problem has come up. The air changes from the defrost to the front panels the to the floor. Its does this several times and then seems stabilize. I have disconnected the battery cabels and cleaned them thinking may have had something to do with it.

Any suggestions would be great.