I looked at the wiring diagraph and there is not a mullion heater in the panel between the freezer and the refrigerator. This is the only place that she is getting any frost. I check both of the door seals with a dollar bill and they seem to be sealing good so I guess I will order and replace the freezer door seal. Thanks for your help, I'll let you all know if it works. This is a easy door gasket to replace, just pushes in the channel and no screws like the old ones!