A refrigerator that has stopped holding temperature is one of the few appliance problems with a clock attached. The food inside starts to matter within hours, so it helps to know what to check, in what order, and at what point to stop checking and book a technician.
The good news is that "not cooling" is a symptom, not a diagnosis. Plenty of the causes are things you can see and fix yourself. The rest can usually be narrowed down before a technician arrives, which makes the visit shorter and the conversation clearer.
First, protect the food
Put an appliance thermometer in the middle shelf of the fresh-food section and another in the freezer. The fresh-food side should sit at or below 40°F and the freezer at or near 0°F. Guessing by touch is unreliable — a fridge that feels "cool" can be sitting at 50°F.
- •Keep the doors shut as much as possible while you troubleshoot. A closed, full refrigerator holds its temperature far longer than one being opened every few minutes.
- •Move milk, meat, fish, leftovers and anything cooked into a cooler with ice if the fresh-food side is climbing past 40°F.
- •Perishable food that has been above 40°F for more than two hours should be thrown out. When in doubt, don't taste-test it.
Read the pattern before touching anything
Where the warmth is tells you a lot about why.
Both compartments warm
If the freezer and fridge are both warm, the whole refrigeration system is not doing its job. Check the simple things first: Is the fridge actually getting power (interior light on, display lit)? Is the display in a showroom or demo mode? Has someone bumped the temperature setting? After that, the usual suspects are the condenser — the part that throws heat out into your kitchen — and the compressor or its start components.
Freezer cold, fresh-food side warm
This is the most common pattern, and it's usually an airflow problem rather than a failed compressor. In most modern refrigerators the cold air is made in the freezer and blown into the fresh-food section through a duct. If that path is blocked by frost, by a fan that has stopped, or by a damper stuck closed, the freezer stays cold while the fridge warms up.
Cooling comes and goes
A fridge that cools for a day or two, warms up, then recovers after being unplugged for a while is often telling you the defrost system has failed. Frost builds up on the evaporator coil until air can't pass through it. Unplugging lets it melt, which is why the problem seems to "fix itself" — briefly.
Checks you can safely do yourself
Unplug the refrigerator before reaching behind or underneath it. If the plug is hard to reach, switch off its circuit at the breaker panel.
- Confirm the settings. Look for a demo, showroom or "cooling off" mode in the display menu, and make sure the temperature controls haven't been turned to the warmest setting.
- Listen and feel inside the freezer. With the door open and the door switch pressed in, you should usually hear the evaporator fan. If the freezer wall panel is coated in frost, or you hear the fan scraping ice, that points to a defrost fault.
- Clear the vents. A bag of frozen vegetables pushed against the air vent at the back of the freezer can starve the fresh-food side on its own. Leave space around the vents in both compartments.
- Clean the condenser coils. On most freestanding models they're behind a grille at the bottom front or on the back. Use a coil brush and a vacuum. Pet hair and dust make a blanket that stops the fridge from shedding heat.
- Check the condenser fan. On bottom-mount condensers there's a small fan near the compressor. With the fridge running (and your hands clear), it should be spinning whenever the compressor hums.
- Test the door seals. Close a sheet of paper in the door at several points. If it slides out with no resistance, the gasket isn't sealing there. A dirty gasket can often be cleaned back into shape with warm soapy water.
- Check the level. Most refrigerators are meant to tip very slightly backward so the doors swing closed. A door that drifts open an inch lets warm air in all day.
Where the refrigerator sits matters
A refrigerator doesn't make cold; it moves heat out of the cabinet into the air around it. The hotter that air, and the less room the condenser has to breathe, the harder the machine works. A refrigerator pushed tightly into a cabinet enclosure, or with a rug or a stack of paper bags against the bottom grille, can run warm in a perfectly normal kitchen.
If the warm refrigerator is a second unit in a garage, especially in the Valley or other inland areas where garages bake in summer, the cause may be the location rather than a fault. Our freezer guide covers climate ratings and garage units in detail.
Signs it needs a technician
Some problems aren't safely fixable at home, and some are cheap to misdiagnose. Book a repair if you notice:
- •The compressor clicks on and off every few minutes without running, or doesn't run at all while the fridge has power
- •Frost keeps building on the back wall of the freezer even after a manual defrost
- •The condenser is clean and the fan runs, but both compartments stay warm
- •A burning smell, a tripped breaker, or a hot outlet
- •Oily residue around the tubing near the compressor, which can indicate a refrigerant leak
How a technician tracks it down
A proper diagnosis separates the four families of cause: airflow, defrost, controls and the sealed system. A technician will typically measure actual temperatures at several points, check whether the evaporator and condenser fans run when they should, look at the frost pattern on the evaporator coil, and test the defrost heater, thermostat or sensors for continuity and resistance. Many models also have a built-in service or test mode that can force a defrost cycle or run components individually.
Sealed-system work — anything involving the refrigerant, the compressor or a leak — comes last, and only once the simpler causes are ruled out. It's the most involved repair on a refrigerator, and it's worth confirming before anyone quotes it. You can read more about the kinds of refrigerator work we handle on our refrigerator repair page.
Keeping it cooling
- •Clean the condenser coils a couple of times a year, and before the hottest months if the fridge lives in a garage.
- •Wipe door gaskets regularly; sticky spills keep them from sealing.
- •Don't overpack the fridge. Cold air needs a path.
- •If you're in an area with frequent brownouts or outages, a surge protector rated for appliances can help protect the electronic control board.
Frequently asked questions
How long should a fridge take to cool down after I fix something?
A refrigerator that has been off or badly warm can take many hours to get back to temperature, and a full day isn't unusual. Check with a thermometer rather than by feel, and avoid loading in a lot of warm food at once.
Is it worth repairing an older refrigerator?
It depends on the cause. A fan, a thermistor or a defrost component is a very different repair from a sealed-system fault. Getting the diagnosis first lets you make that decision with real information. Our repair-or-replace checklist walks through how to weigh it up.
I rent — who fixes the fridge?
If the landlord supplied the refrigerator, repairs usually fall to them, so let your property manager know in writing and keep a note of when the problem started. If you own the fridge yourself, the repair is yours to arrange.