The Refrigerator 'Goldilocks' Temp
Impact
Medium
Difficulty
Easy
Speed
Instant
Your refrigerator doesn't need to be a sub-zero tundra to keep your food safe. In fact, many people have their fridges set significantly colder than necessary, which just burns electricity for nothing.
The FDA recommends keeping your refrigerator at or below 40°F (4°C) and your freezer at 0°F (-18°C). The 'sweet spot' for efficiency is typically between 37°F and 40°F. If you go much lower than that, your compressor has to run significantly more often. Buy a cheap appliance thermometer to verify the actual temperature—don't just trust the built-in dial, which can be wildly inaccurate.
Adjusting the temperature by just a few degrees can save you 10% on the appliance's energy use. It's a 'set it and forget it' hack that protects your food and your wallet. Plus, your lettuce won't get those annoying frozen 'crunchy' spots anymore! It's a more balanced way to live. Check those temps tonight and start saving by morning.