On Thu, 25 Oct 2012 21:51:50 -0700, Ashton Crusher
wrote:

My guess is that while you had it disconnected but with the refrig
still running, the water froze in a part of the water line that it
usually doesn't sit in long enough to freeze. I'd turn the fridge off
for as long as you think you can without losing your frozen stuff and
seeing if that "fixes" it.

That is definitely a possibility. I can't blow through the tube, and
I would expect to be able to if it isn't stopped up.