Kitchen Aid Superba Ice Door Air Leak?

My ice maker leaks water into the catch basin. The ice door no longer closes all the way. I think it allows air to enter the frezzer. All the ice in the bin will eventually freeze together. Ice accumulates in the dispencer tube . I believe it thaws and drips into the basin. Has anyone heard of this problem? Would a stronger spring keep the door closed and stop the leak? If so how do I get to it.