A refrigerator seldom quits cooling in one moment. Usually it drifts. The butter is softer than it should be, then the yogurt feels room temperature, then the crisper drawer is plainly warm while the ice in the freezer still looks fine. That gradual slide is good news in one way: the order in which things warm up, and the sounds the cabinet makes while they do, point toward the cause long before anyone needs to take off a panel.
Below are the checks a homeowner or renter can do safely, what each result tends to mean, and the point where the job belongs to a technician.
Measure before you change anything
Set an appliance thermometer in a small jar of water on a middle shelf and leave it overnight. Tuck a second thermometer between frozen packages in the freezer.
FoodSafety.gov gives the targets: 40°F or colder for the refrigerator and 0°F for the freezer. Write both numbers down. A fresh-food side in the high 40s with a freezer near zero is one kind of problem; both compartments warming together is another.
While you are looking, check the control itself. Dials get nudged by a gallon jug. Digital panels can be switched into a showroom or demo setting, in which the lights and display work normally and the cooling stays off. If the display shows something you don't recognize, the owner's manual will say what it means.
Listen to the cabinet for a few minutes
With the door shut and the kitchen quiet, stand beside the unit and pay attention.
- •Silence for a long stretch. The compressor and condenser fan may not be getting power, or the control may be stuck holding the unit in a defrost cycle.
- •A click, a short hum, and another click a few minutes later. The compressor is trying to start and the overload protector is cutting it off. A failed start relay can do this, and so can a compressor near the end of its life.
- •The compressor never stops, yet nothing gets colder. Think about air movement first, meaning the fans and coils, and only then about refrigerant.
- •Ticking or scraping from inside the freezer. Ice may have grown into the fan blade, which suggests the defrost system has stopped doing its job.
None of these proves anything alone, but each is worth mentioning when you book.
Give the heat somewhere to go
A refrigerator doesn't create cold. It pumps heat out of the insulated box and dumps it through the condenser coil, with help from a small fan. When that coil is felted over with dust and pet hair, or the unit is jammed into a cabinet opening with no room around it, the heat has nowhere to go and the inside temperature creeps up.
Unplug the refrigerator before you reach underneath. On most current models the coil sits low, behind the front toe grille, with the condenser fan beside it; some older units carry it on the back. A long, narrow coil brush and a vacuum crevice tool are enough. Spin the fan blade gently with a finger to make sure it turns freely, then plug the unit back in.
Where the refrigerator stands matters just as much. A spare unit in an attached garage spends the summer in the hottest air on the property. Every owner's manual lists the room-temperature range that model is designed for, and plenty of ordinary kitchen refrigerators were never meant for a closed Florida garage in summer. If yours lives out there and only struggles during the hottest months, the location may be the real fault.
When only the fresh-food side is warm
On a typical top-freezer or side-by-side, the cold is produced at a single evaporator coil behind the freezer's back panel. A fan blows air across that coil, and a duct or damper lets part of it into the refrigerator section. If the freezer holds temperature and the fresh-food side doesn't, the trouble is usually somewhere along that route.
Start with what you can see. Make sure the air vents inside the refrigerator aren't blocked by a case of seltzer or a pizza box pushed against the back wall. Then open the freezer and listen for its fan. On many models it pauses when the door opens, so hold the door switch in with a finger to keep it running.
A thick white layer of frost across the freezer's back panel, or vents packed with ice, means the automatic defrost has stopped working. The defrost heater, the small thermostat or sensor that controls it, and the timer or board that schedules it can each fail. Unplugging the unit with both doors open and letting it thaw completely, with towels on the floor, often brings the cooling back for a few days or weeks. That confirms the diagnosis, but the ice will return until the failed part is replaced. Never chip at the ice with a knife or screwdriver. A pierced evaporator tube loses its refrigerant, and on most household units that ends the repair.
Gaskets, doors and sticky summer air
Each time the door opens on a muggy afternoon, warm, wet air rolls in and has to be cooled and dried. A gasket that has stopped sealing lets that air in around the clock. The signs are water beading on the cabinet face near the door, a band of frost just inside the freezer opening, or a compressor that hardly ever cycles off.
Shut a dollar-sized slip of paper in the door at the top, bottom and both sides, then tug it. A slip that comes out with no resistance marks a weak spot. Wash the gasket with warm, soapy water first, because dried spills and residue are often all that's wrong. A gasket that is torn, flattened or pulling away from the door needs to be replaced. Check the leveling too: the front of the cabinet should sit slightly higher than the back so the doors fall closed by themselves.
After a thunderstorm or a power outage
Afternoon storms knock out power across the area through the summer, and electronic controls don't always like the way power comes back. If the refrigerator returned from an outage with a blank display or no cooling, try a single reset: unplug it for five minutes and plug it back in. A control that wakes up and cools normally may simply have been confused. One that stays dark or keeps showing an error needs testing.
Our guide to appliances after a power outage covers the rest of the house once the lights are back.
Where the home checks end
Cleaning the coil, clearing vents, testing the gasket and doing a full manual defrost are all reasonable things to do yourself. Swapping a start relay or a fan motor is possible for a handy person with the unit unplugged. A few jobs belong to a technician: anything involving the compressor, refrigerant or sealed tubing; testing a control board while it is live; and any fault that keeps coming back after a defrost.
If you would rather have it looked at, call or book a visit. The technician finds the fault in your kitchen and walks you through it, then gives you a price; no work happens until you say yes. Our refrigerator repair page has more on what we work on.
Protecting the food in the meantime
A closed refrigerator keeps food safe for about 4 hours without cooling. A full freezer holds for about 48 hours with the door shut, a half-full one about 24. Discard perishables, such as meat, dairy, leftovers and cut fruit, that have sat above 40°F for more than 2 hours. A cooler with bagged ice will carry the essentials while you wait.
Common questions
Will turning the control to its coldest setting fix it?
Rarely. If cold air isn't reaching the fresh-food side, or the condenser can't shed heat, turning the dial colder just keeps the compressor running. Put the control back to its normal position and find the cause.
Is a refrigerator that stopped cooling worth repairing?
Often it is. Fans, defrost parts, relays and gaskets are ordinary repairs on most models. A sealed-system failure on an older refrigerator is the case where we will tell you that replacing it makes more sense.