Your refrigerator is one appliance that never gets a break. It runs every hour of every day, whether you're home, asleep or away on vacation. That also means even a small improvement in energy efficiency can make a noticeable difference to your electricity bill over time.

After researching dozens of refrigerators across brands, comparing energy ratings, compressor technologies, insulation quality and real-world features, one thing became clear, many households continue using refrigerators that consume far more electricity than necessary. While a refrigerator doesn't suddenly become inefficient overnight, age, worn-out components and outdated technology gradually make it work harder than it should.

If your refrigerator is over a decade old, here's what you should know before deciding whether it's worth keeping or replacing.

Why your old refrigerator could be increasing your electricity bill

Many people assume that if their refrigerator is cooling properly, it's working efficiently. Unfortunately, that's not always true.