What is commonly used to control defrost operations anyway?
If you've ever poked around the back of a refrigerator or looked at a commercial walk-in cooler, you might have wondered what is commonly used to control defrost operations so the whole thing doesn't just turn into a giant block of ice. It's one of those "behind the scenes" things that we never think about until our ice cream starts looking like a glazed donut or the fridge starts making a funky clicking sound. ...