That small control knob or digital setting inside your refrigerator is far more powerful than it looks. In summer, it often needs to be set high to fight the heat, but when winter arrives and the kitchen is cooler, keeping it at maximum is pure waste. Experts recommend dialing the fridge down to levels 2–3, or even 1, where the temperature usually stays around 2–5°C—still cold enough to keep everyday food safe, but gentle enough to cut unnecessary power use.

The freezer deserves the same attention. If it’s packed with meat and seafood, keep it near -18°C to prevent bacteria and preserve quality; if it’s almost empty, you don’t need such intense freezing. Combine smart temperature settings with simple habits—closing the door quickly, not overstuffing shelves, cleaning door seals—and that “always-on” appliance quietly turns from a hidden energy thief into one of the easiest ways to lower your monthly electricity bill without sacrificing comfort or safety.