How efficient is Maytag model MTB2456AEW?

http://www.rekitchen.com/refrigerators/2040.html puts that the average energy consumption is 598KWh/year. Compare that with similar size energyStar rated ones. The Energy Star rated ones consume 430-578KWh/year.

So if you are planning to replace same or bigger size fridge, not much saving. Unless it is broken no need to replace now.

But think about sizing down. Smaller EnergyStar ones are much more efficient. Remember the Parkinson's Law - work expands to available space.