The freezer stopped working for a few days, but I left it plugged in. Within 72 hours, it started to work again. (This also happened several weeks ago) The left side of the freezer, as you face it, is definitely warm to the touch. This is a frost-free model and doesn't seem to have any visible control knobs. Replacing it would be a financial burden, so I'd like to try fixing it. I can do some parts changing. Help! Thanks.