Product review (5 stars): Give it  a try, what do you have to lose, a couple of bucks?
This inexpensive little device works great for thawing out frozen lines in my water and ice dispenser in my refrigerator.  It's one of those things that makes me wonder, "Why didn't I think of that?"  It's very easy to use and I like to keep it  handy if my water lines freeze up again.  If you have this problem with your fridge, give this a try before calling a repairman or buying a new fridge.