You open the door, reach for the milk, and something feels off. The carton isn’t as cold as it should be, and your ice cream has turned into soup. A refrigerator that’s lost its chill is one of the most stressful things a homeowner can face, because so much of your family’s food depends on it. But before you start mentally calculating the cost of a brand-new appliance, take a deep breath. In many cases, the problem is something you can fix yourself with a little patience and basic know-how.

The first thing to check is the temperature settings inside your fridge. It sounds simple, but a stray hand or a curious teenager can easily bump the dial. Your refrigerator should sit at or below 40 degrees Fahrenheit, and your freezer should be at zero degrees. If the controls are digital, look for a display and press the buttons to see what the current reading is. If they’re mechanical, you might need to turn a knob a notch or two colder. Then wait about twenty-four hours before checking again, because these appliances don’t change temperature in minutes. Patience is your friend here.

Next, peek at the condenser coils. These are usually located either on the back of the refrigerator or underneath it, behind a small grill. Over time, these coils collect dust, pet hair, and grime like a magnet. When they’re covered, the fridge has to work overtime to shed heat, and that struggle translates into poor cooling performance. Unplug your refrigerator, pull it away from the wall if you need to, and find the coils. You can clean them with a vacuum hose or a sturdy brush made for this purpose. It’s a dusty job, but it’s one of the most effective maintenance tasks you can do. Doing this every six months can keep your fridge running efficiently for years.

Another common culprit is a worn-out door seal, also known as a gasket. That rubbery lining around the door is designed to keep cold air in and warm air out. If it’s cracked, stretched, or has food stuck to it, cold air will leak out like a sieve. Try this simple test: close the door on a dollar bill and try to pull it out. If it slides out easily or if you can see light gaps when the door is closed, the seal isn’t doing its job. Clean the gasket with warm soapy water first, because dirt can sometimes break the seal. If it’s damaged, you can buy a replacement gasket online and install it with just a screwdriver and a little muscle. It’s a bit fiddly, but plenty of homeowners manage it.

Don’t overlook the airflow inside the fridge either. For cold air to circulate properly, vents shouldn’t be blocked by overstuffed shelves or a big pot of leftovers pressed against the back wall. If you cram the fridge to the brim, those little fans have no room to move air around, creating warm spots. Take a moment to rearrange things so there’s a clear path from the vents to every shelf. Also, make sure your food is covered or wrapped. Uncovered dishes release moisture, which makes the compressor work harder. That extra humidity is bad news for both cooling and your vegetables.

Then there’s the evaporator fan. This fan pushes cold air from the freezer up into the fridge section. If you hear unusual noises like clicking or whirring, or if you don’t hear a fan at all when the fridge is running, it might be frozen up or broken. In many units, ice can build up on the fan blades and stop them from turning. Check your owner’s manual to see how to access the fan, but usually you’ll need to defrost the freezer completely first. If the fan itself is dead, replacing it is a moderately tricky repair, but it’s still doable with the right parts and some online video guidance.

Finally, consider the condenser fan motor. This is a separate fan, usually located near the coils underneath the fridge. If this fan isn’t spinning, the heat from the compressor can’t escape, and your fridge will struggle to stay cool. You might notice the compressor feels very hot to the touch. Cleaning the area around it and ensuring the fan isn’t tangled in debris can sometimes fix the issue. If the motor is burned out, you’ll need a replacement, but that’s a common and affordable part.

Of course, sometimes the problem is something larger, like a failing compressor or a refrigerant leak. If you’ve checked everything above and your fridge still isn’t cold after a day or two, it might be time to call a professional. But here’s the good news: most cooling problems start small. A dirty coil or a loose seal is something you can absolutely handle on a Saturday afternoon. So roll up your sleeves, grab a toothbrush and a vacuum, and give your refrigerator the attention it deserves. More often than not, you’ll be rewarded with perfectly chilled milk and an ice cream that’s solid again. And you’ll have saved yourself a repair bill that could’ve bought a whole new fridge.