Appliances can be deceptively low-maintenance. Take your refrigerator, for example. It's easy to assume it's quietly doing its job in the background, on autopilot. And, to be fair, it usually is. But ...

Q: I’m worried that my refrigerator is not cooling. I just pulled out a can of soda that’s barely cold, and I noticed my milk is also warmer than it should be. Why is my refrigerator not cooling ...