I just moved into a house that has an old Hotpoint freezer in the basement. I know that it worked when the last family moved out, but then it sat empty and unplugged for about a year. I just tried plugging it back in. The light came on but it didn't start cooling. (didn't hear any noises from it) I noticed that the temperature setting dial inside the freezer (what's that called?) is rusty. Could that be the problem, or is it more likely something else?