dezzanguyen

I have a similar problem to my 03 falcon xT, I have been told that I could potentially have an broken heater shaft, sometime when the fan isn't turn on I can randomly fill warm heat coming out into the cabin of my car, I found that strange, sometime when I turn the fan on warm heat comes out for a split second and it stopped, does anyone have any idea of what is wrong with my heater? I have been told that it could be a heater shaft or Him module