When a fridge goes out you usually can tell by the awful smell that wafts in your face as you open it for a beer. Mine didn't do that. It slowly got warmer and warmer until the butter was the consistency of creamy frosting. The freezer was still working so I couldn't figure it out.
Last time the freezer went out, and a $70 repairman visit later, I discovered that the thermostat button had been turned accidentally to full on warm. That was an expensive lesson.
This time I checked all the buttons, knobs and switches but to no avail. They were all fine. So the repairman is here as I speak and informs me that my defrost switch/thermostat thingy (accessible only by a repairman) is broken. At least it wasn't my fault this time.
The repairman told me that with the economy most people are buying used fridges and repairing their old ones. So Maytag apparently has lowered the price on it's fridges, but increased the price on their parts. So what normally would have been a cheap part, now was much more expensive. Funny how companies take advantage of economic woes.